The Zuhr prayer at the earlier time

 211. Khabbab narrated: We came to the Messenger of Allah salla alayhi wa sallam and companined to him about (offering prayer on) the extreme heat of the ground (or sand), but he paid no heed to us. Zuhair said: I asked Abu Ishaq, ´´Whether it was about the Zuhr prayer?´´ He said, ´´Yes.´´ I again asked, ´´Whether it was in its earlier hour?´´ He said, ´´Yes.´´