Sirach 32:12LXX

10Young man, scarcely speak in thy own cause.

11If thou be asked twice, let thy answer be short.

12In many things be as if thou wert ignorant, and hear in silence and withal seeking.

13In the company of great men bake not upon thee: and when the ancients are present, speak not much.

14Before a storm goeth lightning: and before shamefacedness goeth favour: and for thy reverence good grace shall come to thee.