It is not for kings, O Lemuel, it is not for kings to drink wine; nor for princes {e} strong drink:

(e) That is, the king must not give himself to wantonness, and neglect of his office, which is to execute judgment.

Wesley's Notes

31:4 To drink - To excess.

Jamieson-Fausset-Brown Bible Commentary

4, 5. Stimulants enfeeble reason, pervert the heart, and do not suit rulers, who need clear and steady minds, and well-governed affections (compare Pr 20:1; 22:29).

pervert . afflicted-They give unrighteous decisions against the poor.

Matthew Henry's Concise Commentary

31:1-9 When children are under the mother's eye, she has an opportunity of fashioning their minds aright. Those who are grown up, should often call to mind the good teaching they received when children. The many awful instances of promising characters who have been ruined by vile women, and love of wine, should warn every one to avoid these evils. Wine is to be used for want or medicine. Every creature of God is good, and wine, though abused, has its use. By the same rule, due praise and consolation should be used as cordials to the dejected and tempted, not administered to the confident and self-sufficient. All in authority should be more carefully temperate even than other men; and should be protectors of those who are unable or afraid to plead their own cause. Our blessed Lord did not decline the bitterest dregs of the cup of sorrow put into his hands; but he puts the cup of consolation into the hands of his people, and causes those to rejoice who are in the deepest distress.