Muwatta Imam Malik Book of Sadaqa, Hadith 9
Yahya related to me from Malik from Zayd ibn Aslam from Ata ibn Yasar that the Messenger of Allah ﷺ sent a gift to Umar ibn al-Khattab, and Umar returned it. The Messenger of Allah ﷺ said, "Why did you return it?" He said, "Messenger of Allah, didn't you tell us that it is better for us not to take anything from anyone?" The Messenger of Allah ﷺ said, "That is by asking. Provision which Allah gives you is different from asking." Umar ibn al-Khattab said, "By the One in whose hand my self is, I will not ask anything from anyone, and anything that comes to me without my asking for it, I will accept."
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ عَطَاءِ بْنِ يَسَارٍ، أَنَّ رَسُولَ اللَّهِ ﷺ أَرْسَلَ إِلَى عُمَرَ بْنِ الْخَطَّابِ بِعَطَاءٍ فَرَدَّهُ عُمَرُ فَقَالَ لَهُ رَسُولُ اللَّهِ ﷺ " لِمَ رَدَدْتَهُ " . فَقَالَ يَا رَسُولَ اللَّهِ أَلَيْسَ أَخْبَرْتَنَا أَنَّ خَيْرًا لأَحَدِنَا أَنْ لاَ يَأْخُذَ مِنْ أَحَدٍ شَيْئًا فَقَالَ رَسُولُ اللَّهِ ﷺ " إِنَّمَا ذَلِكَ عَنِ الْمَسْأَلَةِ فَأَمَّا مَا كَانَ مِنْ غَيْرِ مَسْأَلَةٍ فَإِنَّمَا هُوَ رِزْقٌ يَرْزُقُكَهُ اللَّهُ " . فَقَالَ عُمَرُ بْنُ الْخَطَّابِ أَمَا وَالَّذِي نَفْسِي بِيَدِهِ لاَ أَسْأَلُ أَحَدًا شَيْئًا وَلاَ يَأْتِينِي شَىْءٌ مِنْ غَيْرِ مَسْأَلَةٍ إِلاَّ أَخَذْتُهُ .