Two birds of prey do not keep each other company.
More Spanish Proverbs:
The mother-in-law must be entreated, and the pot must be let stand.Spanish
We do not know what is good until we have lost it.
Spanish
God defend you from the devil, the eye of a harlot, and the turn of a die.
Spanish
Though the speaker be a fool, let the hearer be wise.
Spanish
Habits are first gossamer then cables.
Spanish
So wise, so young, they say, do ne'er live long.
Spanish