Mahmud ibn Labid reported: The Messenger of Allah, peace and blessings be upon him, said, “Verily, my greater fear for you is the lesser idolatry.” They said, “What is the lesser idolatry, O Messenger of Allah?” The Prophet said, “It is ostentation. Allah Almighty will say to them on the Day of Resurrection, when people are being recompensed for their deeds: Go to those for whom you made a show in the world and look, do you find any reward with them?”
Source: Musnad Aḥmad 23630
Grade: Sahih (authentic) according to Al-Albani
عَنْ مَحْمُودِ بْنِ لَبِيدٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ إِنَّ أَخْوَفَ مَا أَخَافُ عَلَيْكُمْ الشِّرْكُ الْأَصْغَرُ قَالُوا وَمَا الشِّرْكُ الْأَصْغَرُ يَا رَسُولَ اللَّهِ قَالَ الرِّيَاءُ يَقُولُ اللَّهُ عَزَّ وَجَلَّ لَهُمْ يَوْمَ الْقِيَامَةِ إِذَا جُزِيَ النَّاسُ بِأَعْمَالِهِمْ اذْهَبُوا إِلَى الَّذِينَ كُنْتُمْ تُرَاءُونَ فِي الدُّنْيَا فَانْظُرُوا هَلْ تَجِدُونَ عِنْدَهُمْ جَزَاءً
23630 مسند أحمد
1555 المحدث الألباني خلاصة حكم المحدث صحيح في صحيح الجامع