1 Kings 20:11 in the King James Version
And the king of Israel answered and said, Tell him, Let not him that girdeth on his harness boast himself as he that putteth it off.
Context
10 Ben Hadad sent to him, and said, “The gods do so to me, and more also, if the dust of Samaria will be enough for handfuls for all the people who follow me.”
11 The king of Israel answered, “Tell him, ‘Don’t let him who puts on his armor brag like he who takes it off.’”
12 When Ben Hadad heard this message as he was drinking, he and the kings in the pavilions, he said to his servants, “Prepare to attack!” So they prepared to attack the city.