Sirach 7:29
Ben Sira, Ecclesiasticus27 With all your heart honor your father, and do not forget the birth pangs of your mother. 28 Remember that it was of your parents you were born; how can you repay what they have given to you? 29 With all your soul fear the Lord, and revere his priests. 30 With all your might love your Maker, and do not neglect his ministers. 31 Fear the Lord and honor the priest, and give him his portion, as you have been commanded: the first fruits, the guilt offering, the gift of the shoulders, the sacrifice of sanctification, and the first fruits of the holy things.
Didache 4:1
1 My child, thou shalt remember, day and night, him who speaks the word of God to thee, and thou shalt honor him as the Lord, for where the Lord's nature is spoken of, there is he present. 2 And thou shalt seek daily the presence of the saints, that thou mayest find rest in their words. 3 Thou shalt not desire a schism, but shalt reconcile those that strive. Thou shalt give righteous judgement; thou shalt favor no mans person in reproving transgression.
Notes and References
"... There are some intriguing features about Matthew’s use of Sirach: Most of these parallels are unique to Matthew among the gospels. Included here are the structuring of the beatitudes (5:3–12), the makarism concerning those who mourn (5:4), the antithesis against adultery (5:27–28), the warning against prayers that use empty phrases (6:7), warnings against laying up treasure on earth (6:19–24), advice about judging good from bad fruit (7:16), the allusions to Elijah (11:14) and (17:11), Jesus’ teaching concerning the heavy yoke (11:28–30), the parable of the treasure hidden in the field (13:44), the warning that the son of man will repay grievances (16:27), and the separation of the sheep and goats (25:34–40). In other words, these texts and themes are singular to the Matthean mindset and thus are not typical of the remaining evangelists. (2) The vast majority of these usages are related to the topic of wisdom and instruction, a theme naturally derived from Sirach that clearly adds to Matthew’s standing as a gospel focused on teachings and contemplative sayings. But these lessons are not simply sapiential in orientation. In many cases they are associated with eschatological concerns, as with those parallels that appear (6:14), (6:20), (11:14), (16:27), (17:11), and (25:34–40). Thus, regardless of whether Jesus of Nazareth was actually concerned for a futuristic eschatology, Matthew finds within the materials of Sirach a working source by which to portray his teachings as such ..."
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