pat on

pat someone or something on something

to tap someone or something on a particular place with the open hand. She patted the child on the bottom. I patted the car on its hood to show how proud I was of it.
See also: on, pat
References in classic literature ?
Buy a pup and your money will buy Love unflinching that cannot lie-- Perfect passion and worship fed By a kick in the ribs or a pat on the head.