Allah has brought down the Best Hadith; a Book (Quran) that is consistent in its frequent repetitions. 39:23 
So in which Hadith besides it (Quran) do they believe? 77:50
Or do you have some other book in which you are studying? 68:37
The Quran has all the details we need: 
Shall I seek other than God as a law maker when He has brought down to you the Book fully detailed? 6:114
6:114 
The Holy Quran contains clear confirmation that:
God is the only law maker.
The Quran has all the details.