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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:675 – Abū Saʿīd > Isrāʾīl > Abū Isḥāq > al-Ḥārith > ʿAlī

The Messenger of Allah ﷺ said: “The Hour will not begin until one of my Companions is sought as a lost thing is sought and cannot be found.ʿ  

أحمد:٦٧٥ – حَدَّثَنَا أَبُو سَعِيدٍ حَدَّثَنَا إِسْرَائِيلُ حَدَّثَنَا أَبُو إِسْحَاقَ عَنْ الْحَارِثِ عَنِ عَلِيٍّ قَالَ

قَالَ رَسُولُ اللهِ ﷺ لَا تَقُومُ السَّاعَةُ حَتَّى يُلْتَمَسَ رَجُلٌ مِنْ أَصْحَابِي كَمَا تُلْتَمَسُ أَوْ تُبْتَغَى الضَّالَّةُ فَلا يُوجَدُ  

See similar narrations below:

Collected by Aḥmad, Suyūṭī
ahmad:720 – Khalaf b. al-Walīd > Isrāʾīl > Abū Isḥāq > al-Ḥārith > ʿAlī

The Prophet ﷺ said: ʿThe Hour will not begin until one of my Companions will be sought as a lost item is sought, but he will not be found.ʿ  

أحمد:٧٢٠ – حَدَّثَنَا خَلَفُ بْنُ الْوَلِيدِ حَدَّثَنَا إِسْرَائِيلُ عَنْ أَبِي إِسْحَاقَ عَنِ الْحَارِثِ عَنْ عَلِيٍّ قَالَ

قَالَ النَّبِيُّ ﷺ لَا تَقُومُ السَّاعَةُ حَتَّى يُلْتَمَسَ الرَّجُلُ مِنْ أَصْحَابِي كَمَا تُلْتَمَسُ الضَّالَّةُ فَلا يُوجَدُ