A wise old woman used to say: - Wish health and happiness to the one who insults you, and God will know what to give them. Source: Internet
Insults are the arguments employed by those who are in the wrong. Jean-Jacques Rousseau
A wise man is superior to any insults which can be put upon him, and the best reply to unseemly behavior is patience and moderation. Molière
Whoever does not respect you, insults you. Moroccan Proverb
Words of insults are futile, the more they fit, the more they are lost. Icelandic Proverb
He who insults another, digs two graves. Japanese Proverb