One blind man leads another into the ditch.
More French Proverbs:
Good comes to better, and better to bad.French
He has great need of a fool who makes himself one.
French
Loving with the eyes only, has blinded a lot of fools.
French
He who wants to travel far takes care of his beast.
French
If the fire does not burn you the smoke will blacken you.
French
After the daughter is married, then come sons-in-law in plenty.
French