From: Igbo, West Africa
Source: Igbo (Nigeria) oral-tradition proverb. Earlier recorded here as documented in nzukomba.com's "The Best 20 Igbo Proverbs for Respect"; that page, fetched directly, contains a different respect proverb ("Onye kwụrụ ugwu enweta ugwu") and not this one.
The meaning given here is our own reading. Other interpretations exist.