From: Shona, Southern Africa
Source: Shona (Zimbabwe) proverb (tsumo); no. 242 in African Manners, "Shona Proverbs (248 in total)" (africanmanners.wordpress.com). Earlier recorded here as documented by Right for Education and ZimbOriginal; Right for Education's Chishona proverbs page, read directly, does not contain it, and no ZimbOriginal page for it was found.
The meaning given here is our own reading. Other interpretations exist.