Sayyiduna Hudhayfah (may Allah be pleased with him) said: When the Prophet (peace and blessings be upon him) passed away and Sayyiduna Abu Bakr (may Allah be pleased with him) became caliph, he was spoken to about al-Hakam bin Abi al-As, and he said: "I will not untie a knot that the Messenger of Allah (peace and blessings be upon him) tied."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3155