The Prophet (peace and blessings be upon him) commanded Sayyiduna Abu Bakr (may Allah be pleased with him) to lead the people in prayer; (the narrator) mentioned the long hadith. Then the narrator said: The Prophet (peace and blessings be upon him) remained in his place and sat beside the Hijr, warning against trials, and he said: "By Allah, people cannot hold me to anything, except that I make lawful only what Allah Most Pure has made lawful in His Book, and I make unlawful only what Allah Most Pure has made unlawful in His Book."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 13439