Musnad Ahmad 1153:2026

Ishaq ibn Yusuf narrated to us, he said: Mis'ar narrated to us, from 'Amr ibn Murrah, from Abu al-Duha, from Masruq, who said: The truthful woman, daughter of the truthful one, the beloved of the beloved of Allah, the exonerated one, narrated to me that the Messenger of Allah (peace and blessings of Allah be upon him) used to "pray two rak'ahs after the 'Asr prayer," and I did not disbelieve her.