Sirach 51:26

Ben Sira, Ecclesiasticus

24 Why do you say you are lacking in these things, and why do you endure such great thirst? 25 I opened my mouth and said, Acquire wisdom for yourselves without money. 26 Put your neck under her yoke, and let your souls receive instruction; it is to be found close by. 27 See with your own eyes that I have labored but little and found for myself much serenity. 28 Hear but a little of my instruction, and through me you will acquire silver and gold.

Date: 195-175 B.C.E.
* Dates are based on scholarly estimates

Didache 6:2

1 See that no one make thee to err from this Way of the teaching, for he teaches thee without God. 2 For if thou canst bear the whole yoke of the Lord, thou wilt be perfect, but if thou canst not, do what thou canst. 3 And concerning food, bear what thou canst, but keep strictly from that which is offered to idols, for it is the worship of dead gods.

Date: 50-70 C.E.
* Dates are based on scholarly estimates