Reference: al-Haawee min Fataawa ash-Shaykh al-Albaanee – Page 187
Question: If one remembers that he has not performed the ‘Asr [prayer] except after having performed the Maghrib [prayer], should he [then] perform the ‘Asr [prayer] and [then] the Maghrib [prayer] or should he [suffice with] perform the ‘Asr [prayer] only?
Response: He should only perform the ‘Asr prayer, because he has performed the Maghrib [prayer] at its time, and likewise [it is considered] he has performed the ‘Asr [prayer] at it’s time since it’s time is [considered as such] when one remembers [not having performed it].
