“I asked Anas bin Malik: 'What if a man gives his brother a loan, then (the borrower) give him a gift?’ The Messenger of Allah ﷺ said: ‘If anyone of you borrow something then he gives (the lender) a gift or gives him a ride on his riding-beast, he should not accept the gift or the ride, unless they used to treat each other in that manner beforehand.'” (Using translation from Ibn Mājah 2432)
"إِذَا أقرْضَ أحدُكم أخاهُ قرْضًا فأهْدى إِلَيه طبقًا فلا يقْبلهُ أو حَمَلَه على دابَّة فلا يركَبْها، إلَّا أنْ يكونَ جَرى بَينَهُ وبينه قبْلَ ذلكَ" .