Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
tirmidhi:2999Qutaybah > Ḥātim b. Ismāʿīl > Bukayr b. Mismār > Madanī Thiqah > ʿĀmir b. Saʿd b. Abū Waqqāṣ from his father > Lammā Anzal Allāh

from his father who said: "When this Ayah was revealed: 'Come, let us call our sons and your sons, our women and your women... (3:61)' the Messenger of Allah ﷺ called 'Ali, Fatimah, Hasan and Husain and said: 'O Allah! This is my family.'"  

Abū ʿĪsá said that this Ḥadīth is Ḥasan-Ṣaḥīḥ-Gharīb.
الترمذي:٢٩٩٩حَدَّثَنَا قُتَيْبَةُ حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ عَنْ بُكَيْرِ بْنِ مِسْمَارٍ هُوَ مَدَنِيٌّ ثِقَةٌ عَنْ عَامِرِ بْنِ سَعْدِ بْنِ أَبِي وَقَّاصٍ عَنْ أَبِيهِ قَالَ

لَمَّا أَنْزَلَ اللَّهُ هَذِهِ الآيَةَ ( نَدْعُ أَبْنَاءَنَا وَأَبْنَاءَكُمْ ) دَعَا رَسُولُ اللَّهِ ﷺ عَلِيًّا وَفَاطِمَةَ وَحَسَنًا وَحُسَيْنًا فَقَالَ اللَّهُمَّ هَؤُلاَءِ أَهْلِي  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ صَحِيحٌ

See similar narrations below:

Collected by Ḥākim
hakim:4719Jaʿfar b. Muḥammad b. Nuṣayr al-Khuldī > Mūsá b. Hārūn > Qutaybah b. Saʿīd > Ḥātim b. Ismāʿīl > Bukayr b. Mismār > ʿĀmir b. Saʿd from his father

from his father who said: "When this Ayah was revealed: 'Come, let us call our sons and your sons, our women and your women... (3:61)' the Messenger of Allah ﷺ called 'Ali, Fatimah, Hasan and Husain and said: 'O Allah! This is my family.'" (Using translation from Tirmidhī 2999)   

الحاكم:٤٧١٩أَخْبَرَنِي جَعْفَرُ بْنُ مُحَمَّدِ بْنِ نُصَيْرٍ الْخُلْدِيُّ بِبَغْدَادَ ثنا مُوسَى بْنُ هَارُونَ ثنا قُتَيْبَةُ بْنُ سَعِيدٍ ثنا حَاتِمُ بْنُ إِسْمَاعِيلَ عَنْ بُكَيْرِ بْنِ مِسْمَارٍ عَنْ عَامِرِ بْنِ سَعْدٍ عَنْ أَبِيهِ قَالَ

لَمَّا نَزَلَتْ هَذِهِ الْآيَةُ {نَدْعُ أَبْنَاءَنَا وَأَبْنَاءَكُمْ وَنِسَاءَنَا وَنِسَاءَكُمْ وَأَنْفُسَنَا وَأَنْفُسَكُمْ} [آل عمران 61] دَعَا رَسُولُ اللَّهِ ﷺ عَلِيًّا وَفَاطِمَةَ وَحَسَنًا وَحُسَيْنًا فَقَالَ «اللَّهُمَّ هَؤُلَاءِ أَهْلِي»  

هَذَا حَدِيثٌ صَحِيحٌ عَلَى شَرْطِ الشَّيْخَيْنِ وَلَمْ يُخَرِّجَاهُ على شرط البخاري ومسلم