What is the meaning of the prohibition of al-takhaṣṣur in prayer?

The prohibited takhaṣṣur (placing hands on the waist) in prayer refers to placing one's hand on the waist, which is the middle of the human body above the hips. This act is makruh (disliked) because the Prophet, peace and blessings be upon him, forbade takhaṣṣur in prayer, and because it is an action of the Jews.