LEV714 You are forbidden to refuse to lend any article when motivated by revenge. This applies even if you do not explicitly say that you are taking revenge. Similarly, if you lend the article but think to yourself that you are unlike the borrower who refused your request, you are guilty of bearing a grudge. The Torah prohibits feelings of animosity even though nothing is actually said. (Shaarey T’shuvah 3:38; Yad Haktanah, Daios 7:14)