حَدَّثَنَا حَرْمَلَةُ بْنُ يَحْيَى، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ، أَخْبَرَنِي ابْنُ لَهِيعَةَ، عَنْ عِيسَى بْنِ عَبْدِ الرَّحْمَنِ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ أَبِيهِ، عَنْ عُمَرَ بْنِ الْخَطَّابِ، أَنَّهُ خَرَجَ يَوْمًا إِلَى مَسْجِدِ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ فَوَجَدَ مُعَاذَ بْنَ جَبَلٍ قَاعِدًا عِنْدَ قَبْرِ النَّبِيِّ ـ صلى الله عليه وسلم ـ يَبْكِي فَقَالَ مَا يُبْكِيكَ قَالَ يُبْكِينِي شَىْءٌ سَمِعْتُهُ مِنْ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ سَمِعْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ يَقُولُ ‏"‏ إِنَّ يَسِيرَ الرِّيَاءِ شِرْكٌ وَإِنَّ مَنْ عَادَى لِلَّهِ وَلِيًّا فَقَدْ بَارَزَ اللَّهَ بِالْمُحَارَبَةِ إِنَّ اللَّهَ يُحِبُّ الأَبْرَارَ الأَتْقِيَاءَ الأَخْفِيَاءَ الَّذِينَ إِذَا غَابُوا لَمْ يُفْتَقَدُوا وَإِنْ حَضَرُوا لَمْ يُدْعَوْا وَلَمْ يُعْرَفُوا قُلُوبُهُمْ مَصَابِيحُ الْهُدَى يَخْرُجُونَ مِنْ كُلِّ غَبْرَاءَ مُظْلِمَةٍ ‏"‏ ‏.‏

It was narrated from ‘Umar bin Khattab that he went out one day tothe mosque of the Messenger of Allah (PBUH), and he found Mu’adh binJabal sitting by the grave of the Prophet (PBUH), weeping. He said: “Why are you weeping?” He said: “I am weeping because ofsomethingthat I heard from the Messenger of Allah (PBUH). I heard theMessengerof Allah (PBUH) say: ‘A little showing off is polytheismand whoevershows enmity towards a friend of Allah has declared waron Allah.Allah loves those who se righteousness and piety arehidden, thosewho, if they are absent, are not missed, and if theyare present, theyare not invited or acknowledged. Their hearts arelamps of guidanceand they get out of every trial and difficulty.’” Translation Not Available

Book Ref: Sunan Ibn Majah Book 36 Hadith 3989
Web Ref:  Sunan Ibn Majah Vol 5 Book 36 Hadith 3989