عَنْ عُبَادَةَ بْنِ نُسَيٍّ عَنْ شَدَّادِ بْنِ أَوْسٍ رَضِيَ اللَّهُ عَنْهُ أَنَّهُ بَكَى فَقِيلَ لَهُ مَا يُبْكِيكَ قَالَ شَيْئًا سَمِعْتُهُ مِنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُهُ فَذَكَرْتُهُ فَأَبْكَانِي سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ أَتَخَوَّفُ عَلَى أُمَّتِي الشِّرْكَ وَالشَّهْوَةَ الْخَفِيَّةَ قَالَ قُلْتُ يَا رَسُولَ اللَّهِ أَتُشْرِكُ أُمَّتُكَ مِنْ بَعْدِكَ قَالَ نَعَمْ أَمَا إِنَّهُمْ لَا يَعْبُدُونَ شَمْسًا وَلَا قَمَرًا وَلَا حَجَرًا وَلَا وَثَنًا وَلَكِنْ يُرَاؤُونَ بِأَعْمَالِهِمْ وَالشَّهْوَةُ الْخَفِيَّةُ أَنْ يُصْبِحَ أَحَدُهُمْ صَائِمًا فَتَعْرِضُ لَهُ شَهْوَةٌ مِنْ شَهَوَاتِهِ فَيَتْرُكُ صَوْمَهُ
It is narrated from ‘Ubada bin Nusi, who says that Sayyiduna Shaddad bin Aws (may Allah be pleased with him) began to weep. Someone asked him: Why are you weeping? He said: I remembered a hadith that I heard the Messenger of Allah (peace and blessings be upon him) narrate, and that made me weep. I heard him (peace and blessings be upon him) say: I fear for my ummah regarding shirk and hidden desires. I said: O Messenger of Allah! Will your ummah commit shirk after you? He (peace and blessings be upon him) said: Yes, beware! They will not worship the sun, the moon, stones, or idols, but they will show off through their deeds, and the hidden desire is that a servant fasts in the morning, then some desire overcomes him and he breaks his fast.