What is the difference between the Quran and hadith?

The Qur'an is the revealed speech of God, recited in worship. Hadith is what was transmitted from the Prophet ﷺ as saying, action or approval, and it is taken according to the rules of chain and text.

The Qur'an is the revealed Book of God. Hadith is a separate science with its own rules, called the Prophetic hadith, and it has its own technical discipline, the terminology of hadith. Some hadith is a sacred hadith, which the Prophet related from his Lord in its own words. It is not counted as Qur'an and is not recited in worship.