The Sufficient (Vol 3) · Hadith 1787 (#Ḥadīth #17)
Chapter 85 | Performing Optional Salah (Prayer) before or after, Compensatory prayer for them and Salah (prayer) of al-Duha’
17ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ مُحَمَّدِ بْنِ الْحُسَيْنِ عَنْ مُحَمَّدِ بْنِ يَحْيَى بْنِ حَبِيبٍ قَالَ كَتَبْتُ إِلَى أَبِي الْحَسَنِ الرِّضَا (عَلَيْهِ الْسَّلام) يَكُونُ عَلَيَّ الصَّلاَةُ النَّافِلَةُ مَتَى أَقْضِيهَا فَكَتَبَ (عَلَيْهِ الْسَّلام) أَيَّةَ سَاعَةٍ شِئْتَ مِنْ لَيْلٍ أَوْ نَهَارٍ.
17. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Muhammad ibn Yahya ibn Habib who has said the following: “I once wrote to abu al-Hassan, al-Rida’ , asking, ‘There is optional Salah (prayer) on me, when should I perform Qada’ (compensatory prayer for) such missed Salah (prayer)?’ He (the Imam) wrote to me in answer, ‘You can perform them whenever you like, during the day or night.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).