Yahya related to me from Malik from Zayd ibn Aslam from Ata ibnYasar that the Messenger of Allah, may Allah bless him and grant himpeace, sent a gift to Umar ibn al-Khattab, and Umar returned it. TheMessenger of Allah, may Allah bless him and grant him peace, said,"Why did you return it?" He said, "Messenger of Allah, didn't you tellus that it is better for us not to take anything from anyone?" TheMessenger of Allah, may Allah bless him and grant him peace, said,"That is by asking. Provision which Allah gives you is different fromasking." Umar ibn al-Khattab said, "By the One in whose hand my selfis, I will not ask anything from anyone, and anything that comes to mewithout my asking for it, I will accept."
USC-MSA web (English) reference: Book 58, Hadith 9
Arabic reference: Book 58, Hadith 1852