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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
ahmad-zuhd:1118 – ʿAbdullāh from my father > Yazīd > Ḥammād > Thābit > Anas

[Machine] Abu Talhah continued to observe fasting for forty years after the Messenger of Allah ﷺ .  

الزهد لأحمد:١١١٨ – حَدَّثَنَا عَبْدُ اللَّهِ حَدَّثَنِي أَبِي حَدَّثَنَا يَزِيدُ أَنْبَأَنَا حَمَّادٌ عَنْ ثَابِتٍ عَنْ أَنَسٍ

أَنَّ أَبَا [165] طَلْحَةَ سَرَدَ الصَّوْمَ بَعْدَ رَسُولِ اللَّهِ ﷺ أَرْبَعِينَ عَامًا  

See similar narrations below:

Collected by Ṭabarānī
tabarani:4681 – Muḥammad b. ʿAbdullāh al-Ḥaḍramī > ʿAbd al-Aʿlá b. Ḥammād al-Narsī > Ḥammād b. Salamah > Thābit > Anas

[Machine] "That Abu Talhah kept fasting after the death of the Messenger of Allah ﷺ until he died."  

الطبراني:٤٦٨١ – حَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللهِ الْحَضْرَمِيُّ ثنا عَبْدُ الْأَعْلَى بْنُ حَمَّادٍ النَّرْسِيُّ ثنا حَمَّادُ بْنُ سَلَمَةَ عَنْ ثَابِتٍ عَنْ أَنَسٍ

«أَنَّ أَبَا طَلْحَةَ سَرَدَ الصَّوْمَ بَعْدَ وَفَاةِ رَسُولِ اللهِ ﷺ حَتَّى مَاتَ»