The Source of Traditions on Imam al-Riḍā (Vol 2) · Hadith 361 (#Ḥadīth #9)

9 - حَدَّثَنا أَبي رَضِىَ اللهُ عَنْهُ قالَ: حَدَّثَنا سَعْد بْنِعَبْدِ اللَّه، عَنْ يَعْقُوبِ بْنِ يَزِيد، عَنْ عَلىِّ بْن أَشيمِ، عَنْ سُلَيْمان الجَعْفَرِيِّ، عَنْ أَبي الحَسَن الرِّضا a.sُ قالَ: أَتَدْري لَمْ سُمِّيَ إِسْمَاعِيل صادِقَ الوَعْدِ؟ قالَ: قُلْتُ: لا أَدْرِي، فَقالَ: وَعَدَ رَجُلاً فَجَلَسَ لَهُ حَولاً يَنتَظِرُهُ.

32-9 (The author of the book narrated) my father - may God be pleased with him - narrated that Sa’d ibn Abdullah quoted on the authority of Yaqoob ibn Yazid, on the authority of Ali ibn Ahmad ibn Ashyam, on the authority of Soleiman al-Ja’fari that Abil Hassan Ar-Ridha’ told him, ‘Do you know why Ishmael was called strictly true?’ He said, ‘No.’ Imam Ar-Ridha’ said, ‘It was because he made an appointment with someone and waited for him to come for one year.’

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