Sahih Muslim Book - 1, Hadith - 378

حَدَّثَنَا ابْنُ أَبِي عُمَرَ حَدَّثَنَا سُفْيَانُ عَنْ الزُّهْرِيِّ عَنْ عَامِرِ بْنِ سَعْدٍ عَنْ أَبِيهِ قَالَ قَسَمَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَسْمًا فَقُلْتُ يَا رَسُولَ اللَّهِ أَعْطِ فُلَانًا فَإِنَّهُ مُؤْمِنٌ فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَوْ مُسْلِمٌ أَقُولُهَا ثَلَاثًا وَيُرَدِّدُهَا عَلَيَّ ثَلَاثًا أَوْ مُسْلِمٌ ثُمَّ قَالَ إِنِّي لَأُعْطِي الرَّجُلَ وَغَيْرُهُ أَحَبُّ إِلَيَّ مِنْهُ مَخَافَةَ أَنْ يَكُبَّهُ اللَّهُ فِي النَّارِ.

It was narrated from 'Amir bin Sa'd that his father said: "The Messenger of Allah (s.a.w) distributed (some wealth) and I said: 'O Messenger of Allah, give to so-and-so, for he is a believer.' The Prophet (s.a.w) said: 'Or a Muslim.' I said it three times, and each time he replied: 'Or a Muslim.' Then he said: 'I may give to one man, although someone else is more beloved to me than him, for fear lest Allah throw him into the Fire.'"