"Indeed, Allah does not forgive association with Him," meaning: that one should assign partners to Him, "but He forgives what is less than that for whom He wills."
Yahya reported from Sufyan al-Thawri, from Abu al-Zubayr, from Jabir ibn Abdullah who said: "The Messenger of Allah (peace and blessings be upon him) was asked about the two inevitable matters, and he said: 'Whoever dies (not) associating anything with Allah..."