Musannaf Ibn Abi Shayba 3:5870

Abu Bakr narrated to us, he said: Jarir ibn Abd al-Hamid narrated to us, from Mughirah, from Ibrahim, who said: Al-Aswad and his companions used to descend at the time of every prayer while traveling. They would pray the Maghrib prayer at its time. Then they would eat dinner, then they would remain for a while, then they would pray the Isha prayer.