“Time is money” is very famous. And “It’s no use crying over spilt milk”. これは覆水盆に返らずですね。百聞は一見にしかずは？seeing is believing. Practice makes perfect. これは習うより慣れろですね。
実るほどこうべを垂れる稲穂かな It’s not proverb. Our teacher didn’t understand. We didn’t explain.
I found “No rain, no rainbow” 雨が降らなくては虹は出ない in a blog. It became my favorite proverb.