In his book titled "Towards Understanding the Qur'an", Islamic thinker and philosopher Abul Ala Maududi cites a notion that ""Al-Khushoo of the heart is to fear and stand in awe of a powerful person, and al-Khushoo of the body is to bow one's head and lower one's gaze and voice in his presence. In Salaah one is required to show al-Khushoo, both of the heart and of the body, and this is the essence of this Islamic Prayer." It has been reported that when Muhammad once saw a person offering Salaah, as well as playing with his beard, he remarked: ""Had he khushu in his heart, his body would have manifested it.""