The ass well knows in whose house he brays.
More Portuguese Proverbs:
Let every man look to the bread upon which he must depend.Portuguese
Broken friendship may be soldered but can never be made sound.
Portuguese
A great thrust of a lance at a dead Moor.
Portuguese
The ripest fruit will not fall into your mouth.
Portuguese
Let not the bottom of your purse or of your mind be seen.
Portuguese
Give a hint to the man of sense, and consider the thing done.
Portuguese