“Never explain―your friends do not need it and your enemies will not believe you anyway.”
“Don't explain. Your friends do not need it, and your enemies will not believe you”
“Never explain yourself. Your friends don’t need it and your enemies won’t believe it.”
“There's no point in bragging in the good times. Your friends don't need to hear it and your enemies won't believe it anyway.”
“Never make excuses. Your friends don't need them and your foes won't believe them.”
“Always abandon your enemies,and never abandon your friends.”