אַ֤ל לַֽמְלָכִ֨ים ׀ לְֽמוֹאֵ֗ל אַ֣ל לַֽמְלָכִ֣ים שְׁתוֹ־יָ֑יִן וּ֝לְרוֹזְנִ֗ים או [אֵ֣י] שֵׁכָֽר׃
Ce n’est pas aux rois, ô Lemouel, ce n’est pas aux rois qu’il sied de boire du vin, ni aux princes de s’adonner aux liqueurs fortes;
Sforno
ולהבדיל..ולהורות. We know from Hoseah 4,11 that “wine and new wine destroy the minds of My people.” Issuing decrees, verdicts or religious rulings while intoxicated is therefore not tolerable. Solomon, in Proverbs 31,4-5 is similarly critical of such a practice writing: “wine is not for kings, O Lemuel; not for kings to drink, nor any strong drink for princes, lest they drink and forget what has been ordained.”
Rashi
He shall deliver one who is not innocent Heb. אי נקי, synonymous with אין נקִי, not innocent, like (I Sam. 4:21), “Ichabod (איכבוד),” meaning, there is no glory (אין כבוד). And so (Prov. 31:4), “neither is drunkenness for rulers (אי שכר),” there is no drunkenness (אין שכר). It does not befit them to become intoxicated. Menachem joined the three into one group (Machbereth Menachem p. 22). Although they are two words (?), they explain them thus. And that one who is not innocent will be delivered because of the purity of your hands. So I heard. I heard another version that was being said in the name of Rabbi Jacob: This is an expression of a man who lives in pain and sighing, and the “yud” is superfluous in the word, like (Ps. 123:1), “Who dwells (הישבי) in heaven.” But I did not hear this from the rabbi’s mouth.