Deuterocanon

Sirach 3:21

Ben Sira, Ecclesiasticus

17 My child, perform your tasks with humility; then you will be loved by those whom God accepts. 18 The greater you are, the more you must humble yourself; so you will find favor in the sight of the Lord. 20 For great is the might of the Lord; but by the humble he is glorified. 21 Neither seek what is too difficult for you, nor investigate what is beyond your power. 22 Reflect upon what you have been commanded, for what is hidden is not your concern. 23 Do not meddle in matters that are beyond you, for more than you can understand has been shown you. 24 For their conceit has led many astray, and wrong opinion has impaired their judgment.

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

Genesis Rabbah 8:2

Aggadah

Then I [sc. the Torah] was by Him, as a nursling, and I was His delight day after day (Prov. VIII, 30); now the day of the Lord is a thousand years, as it is said, For a thousand years in Thy sight are but as yesterday when it 1s past (Ps. xc, 4). That is the meaning of ‘Knowest thou this of old time?’ The Torah knows what was before the creation of the world, but you have no business to inquire about aught save ‘Since man was placed upon earth’. R. Leazar said in Bar Sira’s name: About what is too great for thee inquire not; what is too hard for thee investigate not; about what is too wonderful for thee know not; of what is hidden from thee ask not; study what was permitted thee: thou hast no business with hidden things.

Date: 500 C.E.
* Dates are based on scholarly estimates