פירוש על מלכים א 20:11

“Tell him, ‘He who puts on the sword shall not brag like the one who takes it off.’” “Say to him, ‘One should not boast, he who arms himself and goes down to war like a man who has been victorious and is coming up from it.’” One should not boast he who puts on his sword to wage to war, for he does not know whether or not he will be victorious.

Like the one who takes it off. His sword binding, [after] he has come up from the war victorious. Similarly, your master should not boast about a future event.