37: Saffat
Chapter: 37, Verse: 24 - Questioning about Wilayat of Imam Ali (as)
ثم ينادى من آخر رصات القيامة: ألا فسوقوهم إلى الجنة [لشهادتهم لمحمد صلى الله عليه وآله بالنبوة] فإذا النداء من قبل الله تعالى: [لا، بل] (وقفوهم إنهم مسؤولون) يقول الملائكة الذين قالوا " سوقوهم إلى الجنة لشهادتهم لمحمد صلى الله عليه وآله بالنبوة ":
لماذا يوقفون يا ربنا؟ فإذا النداء من قبل الله تعالى: [قفوهم] إنهم مسؤولون عن ولاية علي بن أبي طالب وآل محمد، يا عبادي وإمائي إني أمرتهم مع الشهادة بمحمد بشهادة أخرى، فان جاءوا بها فعظموا ثوابهم، وأكرموا مآبهم وإن لم يأتوا بها لم تنفعهم الشهادة لمحمد صلى الله عليه وآله بالنبوة ولا لي بالربوبية، فمن جاء بها فهو من الفائزين، ومن لم يأت بها فهو من الهالكين
Imam Hasan Askari (asws) says;
A voice will come: Take them to Paradise [due to their testifying that Mohammad (saww) is the Prophet of Allah], but another voice will come from Allah: "And stop them, for they shall be questioned" (37:24)
The angels will ask: O Lord! Why are they stopped? Another revelation will come from Allah: "And stop them, for they shall be questioned about the Wilayat of Ali Ibne Abi Talib (as)." That is, they will be asked about the Wilayat of Ali Ibne Abi Talib and the Wilayat of Aale Muhammad.
O My servants and maidservants, I ordered to give one more testimony with the testimony for Muhammad (saww), if they fulfill it, they will get more rewards and increase in good deeds.
If they don’t fulfill it, they will not gain anything for giving witness to the prophethood of Muhammad (saww) and My Lordship. One who brings this testimony will be successful and one who does not bring it, will be destroyed.
[Tafseer al-Askari, Pg 405. under verse 2: 91]
Chapter: 37, Verse: 130 - Aale Muhammad (as) mentioned in the Quran
فَقَالَ أَبُو الْحَسَنِ (عَلَيْهِ السَّلَامُ): «نَعَمْ، أَخْبِرُونِي عَنْ قَوْلِ اللَّهِ عَزَّ وَ جَلَّ: يَس* وَ الْقُرْآنِ الْحَكِيمِ* إِنَّكَ لَمِنَ الْمُرْسَلِينَ* عَلى صِراطٍ مُسْتَقِيمٍ فَمَنْ عَنَى بِقَوْلِهِ: يَس؟ قَالَ الْعُلَمَاءُ: يس: مُحَمَّدٌ (صَلَّى اللَّهُ عَلَيْهِ وَ آلِهِ)، لَمْ يَشُكَّ فِيهِ أَحَدٌ. قَالَ أَبُو الْحَسَنِ (عَلَيْهِ السَّلَامُ): «فَإِنَّ اللَّهَ عَزَّ وَ جَلَّ أَعْطَى مُحَمَّداً وَ آلَ مُحَمَّدٍ مِنْ ذَلِكَ فَضْلًا لَا يَبْلُغُ أَحَدٌ كُنْهَ وَصْفِهِ إِلَّا مَنْ عَقَلَهُ، وَ ذَلِكَ أَنَّ اللَّهَ عَزَّ وَ جَلَّ لَمْ يُسَلِّمْ عَلَى أَحَدٍ إِلَّا عَلَى الْأَنْبِيَاءِ (صَلَوَاتُ اللَّهِ عَلَيْهِمْ)، فَقَالَ تَبَارَكَ وَ تَعَالَى:
سَلامٌ عَلى نُوحٍ فِي الْعالَمِينَ وَ قَالَ: سَلامٌ عَلى إِبْراهِيمَ «٤»، وَ قَالَ: سَلامٌ عَلى مُوسى وَ هارُونَ ، وَ لَمْ يَقُلْ سَلَامٌ عَلَى آلِ نُوحٍ، وَ لَا عَلَى آلِ مُوسَى، وَ لَا عَلَى آلِ إِبْرَاهِيمَ، وَ قَالَ عَزَّ وَ جَلَّ: سَلامٌ عَلى إِلْياسِينَ
From a long hadith where Imam Rida ع explains the differences between Aale-Mohammad ع and the Ummah of Prophet Mohammad ص:
Abul Hassan Imam Rida (ع) said, "Fine. Let me know about the meaning of "Ya Sin" when the Honorable the Exalted Allah says, "Ya Sin. By the Qur'an, full of Wisdom. Thou art indeed one of the apostles on a Straight Way." (36:1-4)
The scholars said, "Undoubtedly ‘Ya Sin’ here refers to Muhammad (ص)."
Abul Hassan (ع) said, “In fact, the Honorable the Exalted Allah granted Muhammad and his family a nobility that no one can understand its true meaning except for one who really ponders over it. The Honorable the Exalted Allah has not blessed anyone but the Prophets (ع).
The Blessed the Sublime Allah said, "Peace be upon Noah among the nations!" (37:79)
He also said, "Peace be upon Abraham!" (37:109)
Allah also said, "Peace be upon Moses and Aaron!" (37:120)
However, Allah does not bless the family of Noah, Abraham, or Moses. But He blesses Muhammad’s (ص) family.
And the Honorable the Exalted Allah said, "Peace be upon il-Yaseen! (Aal-e-Yaseen)" (37:130) - that is the Household of Muhammad (ع)."
[Source: Uyoon al-Akhbar al Rida - Shaikh Sadooq, Ch. 23, Hadith. 1]