‘Abdullah ibn Busr reported a man said, “Messenger of Allah, the laws of Islam are too much for me. Tell me something I can cling to.” He said, “Your tongue should remain moist with the remembrance of Allah.” (at-Tirmidhi)
Abu Sa’id al-Khudri reported that the Messenger of Allah said, “Do a lot of remembrance of Allah until they say, ‘He is mad.'” (Ahmad, Abu Ya’la and Ibn Hibban)
from at-Targhib wa at-Tarhib by Ibn Hajar al-‘Asqalani.