Allah has sent Messengers to communicate His divine call to every human society that have ever lived. As is emphasized in the Qur'an, these messengers, with all their behavior and fine moral attributes, are role models for believers. Prophet Hud (pbuh), who was sent by Allah as an envoy to the people of ‘Ad, is one such honored individual with the role and responsibility of being a Prophet.

To direct their lives, people choose very different teachers or guides. Some select an ideology such a Communism or Capitalism as their guide, imagining that the thinker who first came up with these ideologies was a superior individual and that they can attain the truth by following in that person's footsteps. However, the greatest guide for many people is the society in which they live in. The society determines their value judgments, their sense of right and wrong, of what is true and what is false, according to the general thinking that prevails. Others recognize none of these standards, and instead claim to use their own reason and intuition as their only guides.

However, all of these ideas are founded on one common misconception. People who harbor such ideas reject or else ignore one most important facts, that human beings are a created entity and owe all they have to Allah. Anyone who carefully examines his own body, his environment, the skies above or anything else in existence can clearly see that all these have been created by Almighty Allah.

The sole true reason for any person's creation is to serve Allah; and human beings are created in such a way as to take pleasure from serving Him. In so doing, they are acting in accord with the purpose of their own creation. But although the Qur'an tells us that it is human nature to serve Allah alone, it also informs us that most people are unaware of this great basic truth.

Some of the unaware do not possess the ability to be aware of Allah and to see the truth by themselves. Yet our Lord, the infinitely compassionate and loving, sends them Messengers who will teach them and tell them of the existence of Allah and of the Hereafter, and of the true meaning of life. It is revealed in the Qur'an that every society has been warned by an envoy:

We sent a Messenger among every people saying: "Worship Allah and keep clear of all false gods." Among them were some whom Allah guided but others received the misguidance they deserved. Travel about the Earth and see the final fate of the deniers. (Quran 16: 36)

Prophet Hud (pbuh) is one of those messengers who is described, along with his message, in the Qur'an.  He was sent as a messenger to the people of ‘Ad, Prophet Hud (pbuh) announced to the people that he was a trustworthy emissary dispatched by Allah and called on them to fear Him. The message of Prophet Hud (pbuh) is reported in these words:

And to ‘Ad We sent their brother Hud, who said, "My people, worship Allah! You have no other god than Him. So will you not guard against evil?" (Quran 7: 65)

Prophet Hud Expected No Recompense

As can be seen from the lives of all the Prophets related in the Qur'an, spending one's life preaching the message to others and expecting no reward from them is an important feature of a believer. No matter where or among whom a believer may live, he is responsible for calling on people to adhere to the moral values that Allah approves of and for reminding them of the Day of Judgment that is fast approaching them.

Therefore, the believer expects no recompense from anyone, and seeks merely to fulfill his obligations in the best manner possible so as to obtain the approval of Allah. Prophet Hud (pbuh) exhibited just such a moral virtue, emphasizing that he expected no recompense for having called his tribe to adhere to religious obedience. This fact is revealed in the Qur'an in these words:

"My people! I do not ask you for any wage for it. My wage is the responsibility of Him Who brought me into being. So will you not use your intellect?" (Quran 11: 51)

He Warned His People of Retribution

Prophet Hud (pbuh) warned his people to serve only Allah or else there would be great difficulties that lay ahead. This warning issued by Prophet Hud (pbuh) is reported thus in one verse:

Remember the brother of ‘Ad when he warned his people by the sand-dunes-and warners passed away before and after him- "Worship no one but Allah. I fear for you the punishment of a terrible Day." (Quran 46: 21)

Along with warning his people of coming retribution, Prophet Hud (pbuh) also reminded them that the material things they valued in the life of this world were only transitory. His message on this subject to his people, preoccupied as they were with the attractions of this world, is reported as follows:

"Do you build a tower on every hilltop, just to amuse yourselves, and construct great fortresses, hoping to live forever?" (Quran 42: 128-129)

After this, he reminded his people to fear Allah, to abide by His stipulations, and not treat others tyrannically. Otherwise, as he warned them, torment might be inflicted upon them. This warning by Prophet Hud (pbuh) is reported thus in verses:

"And when you attack, attack as tyrants do? So have fear of Allah and obey me. Have fear of Him who has supplied you with what you know, supplied you with livestock and children and gardens and clear springs. I fear for you the punishment of a terrible Day." (Quran 42: 130-135)

Prophet Hud (pbuh) Reminded His People of Allah's Blessings

It is impossible even to count the number of blessings bestowed by Allah on human beings. (Surat an-Nahl: 18) Yet most people never consider that Almighty Allah bestows all these blessings upon them and that they should therefore give thanks to Him. Neither do they ever think that Allah can take back these blessings at any moment He so chooses. For that reason, the prophets reminded those peoples to whom they were sent to turn to Allah, that everything they possessed was a blessing from Him and that they should give thanks to Him. The Qur'an reveals how Prophet Hud (pbuh) reminded his people of the many blessings imparted by Allah and how they should fear Him and avoid His wrath:

"Or are you astonished that a reminder should come to you from your Lord by way of a man among you in order to warn you? Remember when He appointed you successors to the people of Nuh, and increased you greatly in stature. Remember Allah's blessings, so that hopefully you will be successful." (Quran 7: 69)

Source:

http://us1.harunyahya.com/Detail/T/EDCRFV/ productId/4348/THE_CALL_OF_PROPHET_HUD_(AS)