The Source of Traditions on Imam al-Riḍā (Vol 2) · Hadith 45 (#Ḥadīth #45)

45 - وَبِهذَا الإِسنادِ قالَ: قالَ رَسُولُ اللَّهِ صَلَّى اللهُعَلَيْهِ وَآلِهِ: إِذا كانَ يَوْمَ القِيامَةِ يُدعى بِالعَبدِ؛ فَأَوَّلُ شَيءٍ يُسأَلُ عَنْهُ الصَّلاةُ، فَإِنَّ جاءَ بِها تامَّةً وَإِلّا زُخَّ بِهِ فِي النَّارِ.

31-45 According to the same documentation, God’s Prophet (S) said, “When the Resurrection Day comes, one will be called in and the first thing that he will be questioned about is praying. If he has said his prayers, he will be let go. Otherwise, he will be thrown into the Fire!”

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).