Who throws a stone above him may have it fall on his own head.
More German Proverbs:
Who begins too much, accomplishes little.German
He that has lost his credit is dead to the world.
German
Hobby horses are dearer than Arabians.
German
One ass nicknames another "Long-ears."
German
Every man is the best interpreter of his own words.
German
Saint Swithun's day, if thou be fair, for forty days it will remain; Saint Swithun's day, if thou bring rain, for forty days it will remain.
German