Allah has no Partner or Associate

Allah declares Himself to be above having any child or partner in dominion, control and worship. He says:

مَا اتَّخَذَ اللَّهُ مِن وَلَدٍ وَمَا كَانَ مَعَهُ مِنْ إِلَـهٍ إِذاً لَّذَهَبَ كُلُّ إِلَـهٍ بِمَا خَلَقَ وَلَعَلاَ بَعْضُهُمْ عَلَى بَعْضٍ

Commentary

وَهُوَ يُجِيرُ‌ وَلَا يُجَارُ‌ عَلَيْهِ (And who gives protection and no protection can be given against him - 23:88) The meaning of the verse is that Allah alone can deliver a person from pain and suffering as He wills, but there is none who can save a person from divine punishment. This is true of this world because nobody can stop Allah from rewarding virtuous people nor can anyone protect someone whom He chooses to punish. And the same is true of the Hereafter also. (Qurtubi)