From: Xhosa, Southern Africa
Source: isiXhosa (South Africa) proverb (Unyawo alunampumlo); translation and explanation from "Unique African Xhosa Idioms and Proverbs," Patricia Furstenberg (alluringcreations.co.za). Earlier recorded here as documented by Boston University and tutordoctor.co.za; the explanation is not from those pages.
The source explains it: This proverb is an exhortation to be hospitable
. The wording of the meaning is ours.