Al-Jāmi’ al-Kāmil Ḥadīth [14427] – Encouragement to do Qaylūlah
It is narrated on the authority of Anas bin Mālik (may Allāh be pleased with him) that the Prophet (peace and blessings of Allāh be upon him) said: “Do the qaylūlah (short afternoon nap) because indeed the shayṭān does not do qaylūlah”