He has left behind him an avenger against his enemies, and one to repay the kindness of his friends: It would be legitimate to translate this verse as follows:

• He dies confident that his son will take vengeance on [or, punish] his enemies, and treat his friends with the kindness they deserve.

Quoted with permission from Bullard, Roger A. and Hatton, Howard A. A Handbook on Sirach. (UBS Helps for Translators). New York: UBS, 2008. For this and other handbooks for translators see here.