Musannaf Ibn Abi Shayba 3:5276

Waki’ narrated to us, [who] narrated from Mis’ar, from al-Qasim ibn ‘Abd al-Rahman, who said: ‘Abdullah said: They burn, and when they pray the Dhuhr [prayer], it is washed away. Then they burn, and when they pray the ‘Asr [prayer], it is washed away. Then they burn, and when they pray the Maghrib [prayer], it is washed away. He continued until he mentioned all of the prayers.