ʿUyūn akhbār al-Riḍā - Volume 1 > On Rare Traditions From al-Ridha About Various Issues
Hadith #5

5 - حَدَّثَنا أَبي قالَ: حَدَّثَنا عَبْدِ اللَّه بْنِ جَعْفَر الحِمْيَريُّ عَنْ أَحْمَدِ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنِ الحَسَن بْنِ عَلِى الوَشَّاء، عَن أَبي الحَسَن الرِّضا عَلَيْهِ السَّلامُ، عَن أَبيهِ، عَن‏آبائِهِ عَنْ عَلِيِ‏ عَلَيْهِ السَّلامُ قالَ: قالَ رَسُولَ اللَّهِ‏ صَلَّى اللهُ عَلَيْهِ وَآلِهِ لَمّا اُسْرى‏ بي إِلى السَّماءِ رَأَيْت رحما مُتِعَلِّقَةٌ بِالعرش تشكو رحما إِلى ربها فَقُلْتُ لَها كَمْ بَيْنَكَ وَبينها من أب فَقالَتْ نلتقي فِي أَرْبَعِينَ أَباً.

26-5 (The author of the book narrated) my father - may God be pleased with him - narrated that Abdullah ibn Ja’far al-Himyari quoted on the authority of Ahmad ibn Muhammad ibn Isa, on the authority of Al-Hassan ibn Ali al-Washsha’, on the authority of Abil Hassan Al-Ridha (s), on the authority of his father (s), on the authority of his forefathers (s), on the authority of Ali (s) that God’s Prophet (s) said, “When I was being taken to the heavens on my ascension I saw someone hanging onto the heavens and complaining to his Lord about one of his relatives. I asked him how many generations apart they were from each other. He said that they reach each other to the same grandfather in lineage forty generations back.”