Proverbs 27:2

¹ Do not boast about tomorrow, for you do not know what a day may bring.

Let another praise you, and not your own mouth— a stranger, and not your own lips.

³ A stone is heavy and sand is a burden, but aggravation from a fool outweighs them both.

⁴ Wrath is cruel and anger is like a flood, but who can withstand jealousy?

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB: Let another praise you, and not your own mouth— a stranger, and not your own lips.
KJV: Let another man praise thee, and not thine own mouth; a stranger, and not thine own lips.
WEB: Let another man praise you, and not your own mouth; a stranger, and not your own lips.
ASV: Let another man praise thee, and not thine own mouth; A stranger, and not thine own lips.
DARBY: Let another praise thee, and not thine own mouth; a stranger, and not thine own lips.
BLB: Let a stranger praise you, and not your own mouth—a foreigner, and not your own lips.

ÅB: La en annen rose deg og ikke din egen munn, en fremmed og ikke dine egne lepper!
OTB: La andre rose deg, og ikke din egen munn; la det være en fremmed, og ikke dine egne lepper.
B1930: La en annen rose dig og ikke din egen munn, en fremmed og ikke dine egne leber!

2 Corinthians 10:18
For it is not the one who commends himself who is approved, but the one whom the Lord commends.
Read in context
Proverbs 25:27
It is not good to eat too much honey or to search out one’s own glory.
Read in context
2 Corinthians 10:12
We do not dare to classify or compare ourselves with some who commend themselves. When they measure themselves by themselves and compare themselves with themselves, they show their ignorance.
Read in context
2 Corinthians 12:11
I have become a fool, but you drove me to it. In fact, you should have commended me, since I am in no way inferior to those “super-apostles,” even though I am nothing.
Read in context