Tractate Derekh Eretz Rabbah
Concerning him who loves his fellow-men, who displays friendliness towards his relatives, who marries his sister’s daughter34One has greater affection for a sister than for a brother; hence his affection for his wife, his sister’s daughter, will be the greater. and lends a peruṭah to a poor man in the time of his need, Scripture declares, Then shalt thou call, and the Lord shall answer.35Isa. 58, 9.
Tractate Derekh Eretz Zuta
If you have given him a loan in the time of his emergency, there will be fulfilled in you Then shalt thou call, and the Lord will answer.26Isa. 58, 9.