Romans 12:20 says, 'If your enemy is hungry…' do what?

Answer: Feed him

If your enemy is hungry, feed him; if he is thirsty, give him a drink. In so doing you will heap burning coals on his head.

“On the contrary, “If your enemy is hungry, feed him; if he is thirsty, give him a drink. For in so doing, you will heap burning coals on his head.””— Romans 12:20 (BSB)