Musannaf Ibn Abi Shaybah 8452 — Those who said: the traveller combines

Hafs bin Ubaydullah bin Anas said: We used to travel with Sayyiduna Anas bin Malik (may Allah be pleased with him). When the sun had passed its zenith while he was at a halting place, he would not mount until he had prayed Zuhr; and when he set off and the time of Asr came, he would pray Asr. If he set off from a halting place before the sun passed its zenith and the time of prayer came, we would say to him: "The time of prayer has come." He would say: "Keep moving." Then, when it was the time between the two prayers, he would dismount and pray Zuhr and Asr together. Then he would say: I saw the Messenger of Allah (peace and blessings be upon him), when he joined his forenoon travel to his afternoon travel, do likewise.