From: Igbo, West Africa
Source: Igbo (Nigeria) oral-tradition proverb (Aku ruo ulo amalu onye kpatara ya), discussed in "Decoding the Igbo Proverb on Wealth and Community" (sloaneangelou.blog)
The source explains it: wealth should not be kept to oneself but should be shared to create a ripple effect of prosperity
. The wording of the meaning is ours.