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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
suyuti:1-311b – ʿAṭāʾ
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السيوطي:١-٣١١b –

"عَنِ عَطَاءٍ قَالَ: كَانَ أَبُو بَكْرٍ يَقُولُ: الْجَدُّ أَبٌ مَا لَمْ يَكُنْ دُونهُ أَبٌ، كَما أَنَّ ابنَ الابْنِ ابْنٌ مَا لَمْ يَكُنْ دُونَهُ ابْنٌ".  

[ق] البيهقى في السنن

See similar narrations below:

Collected by Bayhaqī
bayhaqi:12281 – Abū ʿAbdullāh al-Ḥāfiẓ And ʾAbū Saʿīd b. Abū ʿAmr > Abū al-ʿAbbās Muḥammad b. Yaʿqūb > Yaḥyá b. Abū Ṭālib > Yazīd b. Hārūn > al-Rabīʿ b. Ṣubayḥ > ʿAṭāʾ > Kān

[Machine] Abu Bakr used to say, "A grandfather is not a grandfather until there is no grandfather below him, just as a son of a son is not a son until there is no son below him."  

البيهقي:١٢٢٨١ – أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ وَأَبُو سَعِيدِ بْنُ أَبِي عَمْرٍو قَالَا ثنا أَبُو الْعَبَّاسِ مُحَمَّدُ بْنُ يَعْقُوبَ ثنا يَحْيَى بْنُ أَبِي طَالِبٍ أنا يَزِيدُ بْنُ هَارُونَ أنا الرَّبِيعُ بْنُ صُبَيْحٍ ثنا عَطَاءٌ قَالَ

كَانَ أَبُو بَكْرٍ ؓ يَقُولُ الْجَدُّ أَبٌ مَا لَمْ يَكُنْ دُونَهُ أَبٌ كَمَا أَنَّ ابْنَ الِابْنِ ابْنٌ مَا لَمْ يَكُنْ دُونَهُ ابْنٌ