If the eldest son wishes to perform the qaḍāʾ prayers of his mother, he must act according to his own duty with regard to reciting Sūrat al-Ḥamd and the other surah aloud or in a whisper. Therefore, he must perform his mother’s qaḍāʾ ṣubḥ, maghrib, and ʿishāʾ prayers [by reciting Sūrat al-Ḥamd and the other surah] aloud.