New Revised Standard Version
Happy are you, O land, when your king is a nobleman, and your princes feast at the proper time— for strength, and not for drunkenness!

Contemporary English Version
But a nation will prosper when its ruler is mature, and its leaders don't party too much.

New American Bible
Happy are you, O land, whose king is of noble birth, and whose princes dine at the right time— for vigor and not in drinking bouts.

Douay-Rheims Bible
Blessed is the land, whose king is noble, and whose princes eat in due season for refreshment, and not for riotousness.

Blessed is the land, whose king is noble, and whose princes eat in due season for refreshment, and not for riotousness.

when

Ecclesiastes 10:6,7 A fool set in high dignity, and the rich sitting beneath. . . .

Proverbs 28:2,3 For the sins of the land many are the princes thereof: and for the wisdom of a man, and the knowledge of those things that are said, the life of the prince shall be prolonged. . . .

Jeremiah 30:21 And their leader shall be of themselves: and their prince shall come forth from the midst of them: and I will bring him near, and he shall come to me: for who is this that setteth his heart to approach to me, saith the Lord?

and thy

Proverbs 31:4,5 Give not to kings, O Lamuel, give not wine to kings: because there is no secret where drunkenness reigneth: . . .