Sirach 10:26

26 Be not overwise in doing thy business; and boast not thyself in the time of thy distress.

Sirach 10:26 In-Context

24 Great men, and judges, and potentates, shall be honoured; yet is there none of them greater than he that feareth the Lord.
25 Unto the servant that is wise shall they that are free do service: and he that hath knowledge will not grudge when he is reformed.
26 Be not overwise in doing thy business; and boast not thyself in the time of thy distress.
27 Better is he that laboureth, and aboundeth in all things, than he that boasteth himself, and wanteth bread.
28 My son, glorify thy soul in meekness, and give it honour according to the dignity thereof.

The Brenton translation of the Septuagint is in the public domain.