In his pride and anger and his over zealousness to prove he was greater than any god. Did he not say "what God can deliver you from my hands?" and so taunt the Lord? And so taunted, did Jesus not himself come? 7 times higher the furnace temp was raised, and the Lord himself responded, whose number is 7 and 70x7 is the number of the perfection of forgiveness, which he was showing in answering the saving prayer of Shad, Mesh, Abed.