[16].Surah An-Nahl [The Bees] : Ayat 82

Ayat 82. Then, if they turn away, your duty (O Muhammad  [SAWW](PBUH) is only to convey (the Message) in a clear way. Ayat 83. They recognize the Grace of Allah, yet they deny it (by worshipping others besides Allah) and most of them are disbelievers (deny the Prophethood of Muhammad  [SAWW](PBUH).  

Hazrat Ibn Umar (May Allah be pleased with him) said: We counted Messenger [SAWW](PBUH) saying a hundred times during one single sitting: Rabb-ighfir li, wa tubb `alayya, innaka Antat-Tawwabur-Rahim. (My Rubb! Forgive me and pardon me. Indeed, You are the Oft-Returning with compassion and Ever Merciful.''

[Abu Dawud Hadith # 1516 and At-Tirmidhi Hadith # 3434].

Lesson : as mentioned above in Surah An-Nahl Ayat 82. your duty (O Muhammad [SAWW](PBUH) is only to convey (the Message) in a clear way.This Hadith tells us about the etiquette of praying to Allah. We should use the Names of Allah befitting our prayers, i.e., the Names of Allah signifying those Attributes of Allah which have a special concern with the subject of our particular prayer, i.e., while seeking forgiveness, His Names concerning His Attributes of forgiveness and kindness should be used. On the other hand, while praying for worldly matters, we should mention His Qualities of charity and bestowing gifts etc.