al-Aswad bin Yazid الأسود بن يزيد بن قيس النخعي · The Chapters on Charity

“Whoever gives respite to one in difficulty, he will have (the reward of) an act of charity for each day. Whoever gives him respite after payment becomes due, will have (the reward of) an act of charity equal to (the amount of the loan) for each day.”

“Whoever demands his rights let him do so in a decent manner as much as he can.”