Simak narrates from Sayyiduna Jabir (may Allah be pleased with him): "The Messenger of Allah (peace and blessings be upon him) would pray Zuhr when the sun declined, that is, when it passed the meridian, and he would pray Asr close to the time of your prayer."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1882