ENOfficial
He reported the Prophet (ﷺ) as saying, "When a man makes a loan to another he must not accept a present." Bukhari transmitted it in his Ta’rikh, as is said in al-Muntaqa.
Source: sunnah.com
Other translations
Arabic
وَعَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «إِذَا أَقْرَضَ الرَّجُلُ الرَّجُلَ فَلَا يَأْخُذُ هَدِيَّةً» . رَوَاهُ الْبُخَارِيُّ فِي تَارِيخِهِ هَكَذَا فِي الْمُنْتَقى
sunnah.com