Sirach 13:17
Ben Sira, Ecclesiasticus15 Every creature loves its like, and every person the neighbor. 16 All living beings associate with their own kind, and people stick close to those like themselves. 17 What does a wolf have in common with a lamb? No more has a sinner with the devout. 18 What peace is there between a hyena and a dog? And what peace between the rich and the poor? 19 Wild asses in the wilderness are the prey of lions; likewise the poor are feeding grounds for the rich.
Matthew 10:16
14 And if anyone will not welcome you or listen to your message, shake the dust off your feet as you leave that house or that town. 15 I tell you the truth, it will be more bearable for the region of Sodom and Gomorrah on the day of judgment than for that town! 16 “I am sending you out like sheep surrounded by wolves, so be wise as serpents and innocent as doves. 17 Beware of people, because they will hand you over to councils and flog you in their synagogues. 18 And you will be brought before governors and kings because of me, as a witness to them and to the Gentiles.
Notes and References
Jefford, Clayton N. "The Wisdom of Sirach and the Glue of the Matthew–Didache Tradition" in Bingham, D. Jeffrey, editor. Intertextuality in the Second Century (pp. 8-23) Brill, 2016