Knock acorns from another oak

Explanation

the proverb is said of those who keep asking favours or borrowing from the same persons. For men once lived on acorns, and they used to call those who gathered this fruit for hire "acorn-shakers." So when, the gathering being already done, some folk look about to see if any acorns are left on the oak, the passers-by mockingly say, "Knock acorns from another oak."