Son of Adam tells a lie against his Lord and abuses him
21) Narrated Abu Huraira : The Prophet said: Allah Juu said: The son of Adam disbelieves inMe though he ought not and he abuses Me though he hasno right for that. As for his disbelieving in Me, it is hisstatement that He will not be resurrected as was created,though his recreation is easier to Me than the first creation.
As for his abusing Me, it is his say that Allah has a son, but I am the One, the Everlasting. Neither I have begotten nor have been begotten nor do I have any match.
(This Hadith is sound and reported by Bukhari and Nasa'i).
Making associates to Allah is in a way, calling Allah by bad names. Allah is the One and the only God.