Musannaf Ibn Abi Shayba 3:1098

Ibn Idris narrated to us, from Layth, from Mujahid, from Ibn Abbas, who said: A man frequented him for a month, asking him about a man who fasts the day and stands [in prayer] the night, but does not attend Friday [prayer] nor the congregational [prayer]. He said: "He is in the Fire."