מוסר אויף תהילים 41:2

The cruel person is very far from all good qualities, for he has no pity on the poor, and will not loan to them in the time of their distress and gives them nothing. And it is written: "He that is gracious to the poor lends to the Lord" (Ibid. 19:7). And it is further said: "Well is it with the man that deals graciously and lends, and orders his affairs justly" and it says (Ps. 112:5), "Happy is he that considers the poor. In the day of evil the Lord will deliver him" (Ibid. 41:2). And all these instances are the opposite of cruelty and are not found in the cruel person.

And further: Another poor man came before Rabbi Yitzchak carrying a half ma’ah coin in his hand. He said to Rabbi Yitzchak, “Make my soul and those of my sons and daughters whole.” Rabbi Yitzchak replied, “How can I make your souls whole when I have only a half ma’ah coin on me?” The poor man answered, “I will complete your coin with the half ma’ah coin that I already have.” So Rabbi Yitzchak took out his coin out and gave it to him. Then Rabbi Yitzchak was shown a dream in which he was walking along the shore of the ocean and someone was trying to throw him in. He reached for the outstretched hand of Rabbi Shimon ben Yochai but just then the poor man came along and saved him. When he awoke, this is the verse that came into his mouth, “Fortunate is the one who understands [the needs of] the lowly, on a day of evil Hashem will preserve him” (Tehillim 41:2).