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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
tirmidhi:2648 – Muḥammad b. Ḥumayd al-Rāzī > Muḥammad b. al-Muʿallá > Ziyād b. Khaythamah > Abū Dāwud > ʿAbdullāh b. Sakhbarah > Sakhbarah

narrated that the Prophet ﷺ said: "Whoever seeks knowledge, he is atoning for what has passed (of sins while doing so)."  

الترمذي:٢٦٤٨ – حَدَّثَنَا مُحَمَّدُ بْنُ حُمَيْدٍ الرَّازِيُّ حَدَّثَنَا مُحَمَّدُ بْنُ الْمُعَلَّى حَدَّثَنَا زِيَادُ بْنُ خَيْثَمَةَ عَنْ أَبِي دَاوُدَ عَنْ عَبْدِ اللَّهِ بْنِ سَخْبَرَةَ عَنْ سَخْبَرَةَ

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ طَلَبَ الْعِلْمَ كَانَ كَفَّارَةً لِمَا مَضَى  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ ضَعِيفُ الإِسْنَادِ أَبُو دَاوُدَ يُضَعَّفُ وَلاَ نَعْرِفُ لِعَبْدِ اللَّهِ بْنِ سَخْبَرَةَ كَبِيِرَ شَيْءٍ وَلاَ لأَبِيهِ وَاسْمُ أَبِي دَاوُدَ نُفَيْعٌ الأَعْمَى تَكَلَّمَ فِيهِ قَتَادَةُ وَغَيْرُ وَاحِدٍ مِنْ أَهْلِ الْعِلْمِ

See similar narrations below:

Collected by Dārimī, Suyūṭī
darimi:580 – Muḥammad b. Ḥumayd > Muḥammad b. al-Muʿallá > Ziyād b. Khaythamah > Abū Dāwud > ʿAbdullāh b. Sakhbarah > Sakhbarah

narrated that the Prophet ﷺ said: "Whoever seeks knowledge, he is atoning for what has passed (of sins while doing so)." (Using translation from Tirmidhī 2648)  

الدارمي:٥٨٠ – أَخْبَرَنَا مُحَمَّدُ بْنُ حُمَيْدٍ حَدَّثَنَا مُحَمَّدُ بْنُ الْمُعَلَّى حَدَّثَنَا زِيَادُ بْنُ خَيْثَمَةَ عَنْ أَبِي دَاوُدَ عَنْ عَبْدِ اللَّهِ بْنِ سَخْبَرَةَ عَنْ سَخْبَرَةَ

عَنِ النَّبِيِّ ﷺ قَالَ «مَنْ طَلَبَ الْعِلْمَ كَانَ كَفَّارَةً لِمَا مَضَى»