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.
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:2647 – Naṣr b. ʿAlī > Khālid b. Yazīd al-ʿAtakī > Abū Jaʿfar al-Rāzī > al-Rabīʿ b. Anas > Anas b. Mālik

that the Messenger of Allah ﷺ said: "Whoever goes out seeking knowledge, then he is in Allah's cause until he returns."  

الترمذي:٢٦٤٧ – حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ قَالَ حَدَّثَنَا خَالِدُ بْنُ يَزِيدَ الْعَتَكِيُّ عَنْ أَبِي جَعْفَرٍ الرَّازِيِّ عَنِ الرَّبِيعِ بْنِ أَنَسٍ عَنْ أَنَسِ بْنِ مَالِكٍ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ خَرَجَ فِي طَلَبِ الْعِلْمِ فَهُوَ فِي سَبِيلِ اللَّهِ حَتَّى يَرْجِعَ  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ وَرَوَاهُ بَعْضُهُمْ فَلَمْ يَرْفَعْهُ

See similar narrations below:

Collected by Suyūṭī
suyuti:21458a –
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السيوطي:٢١٤٥٨a –

"مَنْ خَرَجَ في طَلَبِ العِلمِ فَهُوَ في سَبِيلِ اللهِ حَتَّى يَرْجِعَ".  

[ت] الترمذي حسن غريب، [ع] أبو يعلى [طب] الطبرانى في الكبير [ض] ضياء المقدسي في مختاره عن أَنس