Evidence that delaying it does not extend to the end of its time

It is narrated from Anas bin Malik (may Allah be pleased with him) that he said: When we prayed Zuhr behind the Messenger of Allah (peace and blessings be upon him), we would prostrate on our clothes to protect ourselves from the intensity of the heat.

It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) used to pray in winter (at such a time) that we did not know whether most of the day had passed or was still remaining (whether the part of the day that had passed was greater or the part that remained).
If this report is authentic, it is evidence that there was a difference in his (peace and blessings be upon him) prayer according to winter and summer. The report of Bakr bin Abdullah al-Muzani (may Allah have mercy on him) will be understood to mean that the delay of the Zuhr prayer in the heat did not reach its last time, and that the Companions (may Allah be pleased with them) felt the heat of the sands and the valleys despite the prayer being delayed. And Allah knows best.