It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him), during his Hajj, entered the state of ihram at (the time of) one of the two prayers after the sun had declined (Zuhr or Asr).
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Qatadah (may Allah have mercy on him) except Hisham (may Allah have mercy on him), and no one from Hisham (may Allah have mercy on him) except Mu'adh (may Allah have mercy on him), in his book."
Hadith Referenceالمعجم الأوسط / باب الألف / 2829
Hadith Takhrij«أخرجه الضياء المقدسي فى «الأحاديث المختارة» برقم: 2545، والدارمي فى «مسنده» برقم: 1848، والبزار فى «مسنده» برقم: 7183، والطبراني فى «الأوسط» برقم: 5451»