O Allah, I ask You the good which Your Prophet Muhammad (may the peace and blessings of Allah be upon him) begged You
Abu Umamah (May Allah be pleased with him) reported:
The Messenger of Allah (may the peace and blessings of Allah be upon him) made many supplications which we did not memorize. We said to him:
"O Messenger of Allah! You have made many supplications of which we do not remember anything." He said, "Shall I tell you a comprehensive prayer? Say: 'Allahumma inni as'aluka min khairi ma sa'alaka minhu nabiyyuka Muhammad sallallahu 'alaihi wa sallam. Wa 'a'udhu bika min sharri mas-ta'adha minhu nabiyyuka Muhammad sallallahu 'alaihi wa sallam. Wa Antal-Musta'anu, wa 'alaikal-balaghu, wa la hawla wa la quwwata illa billah (O Allah, I ask You the good which Your Prophet Muhammad (may the peace and blessings of Allah be upon him) begged You; and I seek refuge in You from the evil where from Your Prophet Muhammad (may the peace and blessings of Allah be upon him) sought refuge. You are the One from Whom help is sought and Your is the responsibility to communicate (the truth). There is no power or strength except with Allah the Exalted, the Great."'
[At- Tirmidhi]
The Prophet (may the peace and blessings of Allah be upon him) used to call upon Allah - the Almighty - with many supplications which combine all the aspects of goodness, in a magnificent manner that touches the hearts of the believers and controls their feelings. They can only strive to memorize and percieve them. So that they mention these supplications continually in submission to their Lord, in implementation of their role model may the peace and blessings of Allah be upon him.
For they knew that the supplication is essence of the worship, the sincere translation of the pure servitude, and the profound manifestation of the perfection of the need for the Only true god.
The du'aa is a significant part of the tradition of the Prophets. They are the best of people to supplicate their Lord, especially the most pious of them Muhammad may the peace and blessings of Allah be upon him.
The righteous slaves of Allah followed their approach. The best of them are the companions of Muhammad, may Allah be pleased with them and then those who follow them with the righteousness untill the Day of Judgment.
There is no doubt that the authentic supplications of the Messenger of Allah (may the peace and blessings of Allah be upon him) is better, closer to acceptance and greater in reward. This is why the companions of the Prophet, may Allah be pleased with them, were keen on memorizing the supplications of truthful and the trustworthy one may the peace and blessings of Allah be upon him.
The Muslim should choose from him what is easy for him to memorize, easy for his tongue to pronounce, that which he feels its sweetness in his heart, and what is most clear in terms of expressing his demand from his Lord the Almighty.
The proper form of supplication is that which represents the complete need to Allah the Almighty and all the permissible demands. Please note that the etiquettes of the supplication should be observed. Otherwise, it is possible that the supplication may be rejected.