Whoever you find in hardship, overlook his debt

It is narrated from Sayyiduna Abu Mas'ud al-Badri (may Allah be pleased with him) that a man was brought to account and no good deed was found for him. He was wealthy and used to lend to people, and he would say to his servants: "Whoever you find well-off, collect from him, and whoever you find in hardship, be lenient with him, so that Allah may be lenient with me." So Allah Almighty said: "I am more entitled to be lenient with him."
This chain is sahih (authentic) on the condition of the two Shaykhs, but they did not record it.

It is narrated from Sayyiduna Abu Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "A man was brought to account and no good deed was found for him," and then he narrated something similar in meaning to the previous hadith.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that a man held on to a debtor of his over ten dinars. The debtor said to him: "By Allah, I have nothing with which to pay you today." He said: "By Allah, I will not leave you until you pay or bring a guarantor who will take responsibility on your behalf." He said: "By Allah, I have nothing to pay with, and I cannot find anyone to take responsibility for me." The narrator said: So he dragged him to the Messenger of Allah (peace and blessings be upon him). He (the debtor) said: "O Messenger of Allah, this man is clinging to me. I asked him for respite of a single month, but he refused unless I pay him or bring him a guarantor. I said: By Allah, I cannot find a guarantor, and I have nothing to pay with today." The Messenger of Allah (peace and blessings be upon him) said to him: "Are you asking him for more than a single month's respite?" He said: "No." He (peace and blessings be upon him) said: "Then I will stand as guarantor for it on your behalf." So the Messenger of Allah (peace and blessings be upon him) took responsibility for it on his behalf. The man went and brought the amount he had promised. The Messenger of Allah (peace and blessings be upon him) asked him: "Where did you get this gold?" He said: "From a mine." He (peace and blessings be upon him) said: "Go, we have no need of it; there is no good in it." Then the Messenger of Allah (peace and blessings be upon him) paid it off on his behalf himself.
This hadith is sahih (authentic) on the condition of Bukhari on account of Amr bin Abi Amr, and on the condition of Muslim on account of al-Darawardi, but the two Shaykhs did not record it.