(97) باب الاِسْتِقْرَاضِ
it was narrated from Isla'il bin Ibrahim bin 'Abdullah bin Abi Rabi'ah, from his father, that his grandfather said:
"The Prophet borrowed forty thousand from me, then some wealth came to him, and he paid me back and said: 'May Allah bless your family and your wealth for you: the reward for lending is praise and repayment."
Reference: Sunan an-Nasa'i 4683
In-book reference: Book 44, Hadith 235
English translation: Vol. 5, Book 44, Hadith 4687