Musannaf Ibn Abi Shayba 3:5861

Waki’ narrated to us, he said: Mughira bin Ziyad narrated to us, from ‘Ata’, from ‘Aisha, that the Prophet (peace and blessings of Allah be upon him) used to delay the Dhuhr and hasten the ‘Asr, and delay the Maghrib and hasten the ‘Isha’ during travel.