Jami at Tirmidhi 2385

حَدَّثَنَا عَلِيُّ بْنُ حُجْرٍ، أَخْبَرَنَا إِسْمَاعِيل بْنُ جَعْفَرٍ، عَنْ حُمَيْدٍ، عَنْ أَنَسٍ، أَنَّهُ قَالَ:‏‏‏‏ جَاءَ رَجُلٌ إِلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ:‏‏‏‏ يَا رَسُولَ اللَّهِ،‏‏‏‏ مَتَى قِيَامُ السَّاعَةِ، ‏‏‏‏‏‏فَقَامَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِلَى الصَّلَاةِ، ‏‏‏‏‏‏فَلَمَّا قَضَى صَلَاتَهُ، ‏‏‏‏‏‏قَالَ:‏‏‏‏ أَيْنَ السَّائِلُ عَنْ قِيَامِ السَّاعَةِ ؟ فَقَالَ الرَّجُلُ:‏‏‏‏ أَنَا يَا رَسُولَ اللَّهِ، ‏‏‏‏‏‏قَالَ:‏‏‏‏ مَا أَعْدَدْتَ لَهَا ؟ قَالَ:‏‏‏‏ يَا رَسُولَ اللَّهِ مَا أَعْدَدْتُ لَهَا كَبِيرَ صَلَاةٍ، ‏‏‏‏‏‏وَلَا صَوْمٍ إِلَّا أَنِّي أُحِبُّ اللَّهَ وَرَسُولَهُ، ‏‏‏‏‏‏فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ:‏‏‏‏ الْمَرْءُ مَعَ مَنْ أَحَبَّ وَأَنْتَ مَعَ مَنْ أَحْبَبْتَ ،‏‏‏‏ فَمَا رَأَيْتُ فَرِحَ الْمُسْلِمُونَ بَعْدَ الْإِسْلَامِ فَرَحَهُمْ بِهَذَا،‏‏‏‏ قَالَ أَبُو عِيسَى:‏‏‏‏ هَذَا حَدِيثٌ صَحِيحٌ.

Anas narrated that a man came to the Messenger of Allah (s.a.w) and said: O Messenger of Allah! When will the Hour be established? So the Propher (s.a.w) stood to perform Salat and when he was finished his Salat he said: Where is the one who asked when the hour will be established? The man said: It was I, O Mesenger of Allah! He said: What have you prepared for it? He said: O Messenger of allah! I have not prepared very much of salat nor fasting for it, but I love Allah and His Messenger. So the Messenger of Allah(s.a.w) said: A man shall be with whom ever he loves, and you shall be with whomever you love. So after the advent of Islam, I did not see that anything brought the Muslims more happiness than that.