on foot , also: afoot old-fashioned
by foot

I've never seen a man look so dead on his feet.

At last they were set on their feet once more.

We've been on our feet for four hours without a break.

The few still on their feet could not go forward.

Yeah, when we first came over here, I knew my parents had to go through a lot to put themselves on their feet.

Especially until he's well and back on his feet again.

But he still had two men on their feet behind him.

The least I could do was stand on my own feet.

She was on her feet but looked away from his eyes.

Those guys're going to be dead on their feet soon.