Counsel and advise him; if he refuses to listen, then let adversity teach him.

What it means
Give advice first, as you should. But if words don't get through, let the consequences do the teaching, since they teach whether a person wants to listen or not.
Amharic · East Africa
Source and context
From: Amharic, East Africa
Source: Ethiopian Amharic proverb; no. 1 in the English list of "155 Ethiopian Proverbs and Wise Sayings in Amharic and English" (allaboutethio.com). That page lists the sayings without explanations, so the meaning given here is our own reading.

The meaning given here is our own reading. Other interpretations exist.