"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."
Sunan an-Nasa'i Book 44, Hadith 235
← Previous Hadith "If a woman is married off by two guardians, then the first marriage is the one that counts, and if a man sells something to two men, it belongs to the first one."

Sunan an-Nasa'i Book 44, Hadith 234 Next Hadith → "We were sitting with the Messenger of Allah when he raised his head toward the sky, and put his palm on his forehead, then he said: 'Subhan Allah, what a stern warning has been revealed! We fell silent and were scared. The following day I asked him: 'O Messenger of Allah, what is this stern warning that has been revealed? He said: 'By the One in Whose hand is my soul, if a man were to be killed in the cause of Allah then brought back to life, then killed, but he owed a debt, he would not enter paradise until his debt was paid off,"

Sunan an-Nasa'i Book 44, Hadith 236