Salaam... Is there a Hadith about the tongue being more hurtful than physically hitting someone
I do not know if it is a Hadith or not but there are certainly many statements that emphasize on guarding the tongue that also includes not hurting someone by words. The Prophet Sallallahu Alaihe Wa Sallam also said: Whoever guarantees me (the protection of) that which is between the jaws and between the legs then I will give him the guarantee of Jannah.
And Allah knows best.
Mufti Ikram ul Haq
Fatwa Center of America