What is the ruling on kissing the hand of a righteous man and bowing to him?

Kissing the hand is disliked if it becomes a habit, but permissible if it is not habitual, especially with righteous people. Prostrating on the hand is forbidden, and scholars call this the minor prostration (Sajdat al-Sughra). As for bowing (al-inhina'), it is not permissible because it is an act of worship, unless it is not for glorification, such as bowing to shake hands with someone short or seated. Indeed, there is a prohibition against bowing for greeting.