Proof That the Quran Is Complete and That the Hadith Books Are Not Needed
Following is proof that the Quran alone is sufficient and complete for the purposes of Islamic guidance and law. Consequently, the hadith books are not needed to supplement or clarify the Quran.
The Quran is complete
Fortunately, we don’t need to guess whether verse 31:27 suggests that the Quran is complete. God admits in verses 6:115 and 6:38 that the Quran is complete. Also, common sense says that God is perfect. Therefore, why would God send down an incomplete Quran? Was God too busy that He couldn’t finish the Quran? Obviously not. Did God say in the Quran that because the Quran is incomplete, we have to figure out the missing parts from Prophet Muhammad’s sayings (hadith)? Obviously not.
And there is no creature on [or within] the earth or bird that flies with its wings except [that they are] communities like you. We have not neglected in the Register a thing. Then unto their Lord they will be gathered. (6:38)
The Quran is fully detailed (fussilat) of all things
Not only is the Quran complete, but it’s also detailed.
There was certainly in their stories a lesson for those of understanding. Never was the Qur’an a narration invented, but a confirmation of what was before it and a detailed explanation of all things and guidance and mercy for a people who believe. (12:111)
And We have placed over their hearts coverings, lest they understand it, and in their ears deafness. And when you mention your Lord in the Qur’an alone, they turn back in aversion. (17:46)
God never runs out of words
Many people seem to think that the Quran is incomplete and therefore, believe that Prophet Muhammad’s sayings (hadith) complete the Quran. According to verse 31:27, God never runs out of words. Therefore, God could have written more words in the Quran to explain things to people. But since God didn’t write more than what’s in the Quran, He must have considered the Quran complete.
And if whatever trees upon the earth were pens and the sea [was ink], replenished thereafter by seven [more] seas, the words of Allah would not be exhausted. Indeed, Allah is Exalted in Might and Wise. (31:27)
The best hadith (statement) is God’s statement (the Quran)
In verse 39:23, God says that the best saying / statement (hadith) is God’s hadith. So why would anyone want to follow some other hadith, e.g. via Bukhari, Muslim, Tirmidzhi, etc?