حَدَّثَنَا أَحْمَدُ بْنُ سَعِيدٍ الدَّارِمِيُّ، حَدَّثَنَا النَّضْرُ بْنُ شُمَيْلٍ، حَدَّثَنَا حَمَّادٌ، عَنْ ثَابِتٍ، عَنْ أَبِي أَيُّوبَ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو، قَالَ صَلَّيْنَا مَعَ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ الْمَغْرِبَ فَرَجَعَ مَنْ رَجَعَ وَعَقَّبَ مَنْ عَقَّبَ فَجَاءَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ مُسْرِعًا قَدْ حَفَزَهُ النَّفَسُ و قَدْ حَسَرَ عَنْ رُكْبَتَيْهِ فَقَالَ ‏"‏ أَبْشِرُوا هَذَا رَبُّكُمْ قَدْ فَتَحَ بَابًا مِنْ أَبْوَابِ السَّمَاءِ يُبَاهِي بِكُمُ الْمَلاَئِكَةَ يَقُولُ انْظُرُوا إِلَى عِبَادِي قَدْ قَضَوْا فَرِيضَةً وَهُمْ يَنْتَظِرُونَ أُخْرَى ‏"‏ ‏.‏

It was narrated that 'Abdullah bin 'Amr said: "We performed the Maghrib (prayer) with the Messenger of Allah, then those who went back went back, and those who stayed, stayed. Then the Messenger of Allah came back in a hurry, out of breath, with his garment pulled up to his knees, and said: 'Be of good cheer, for your Lord has opened one of the gates of heaven and is boasting of you before the angels, saying: "Look at My slaves; they have fulfilled one obligatory duty and are awaiting another." Translation Not Available

Book Ref: Sunan Ibn Majah Book 4 Hadith 801
Web Ref:  Sunan Ibn Majah Vol 1 Book 4 Hadith 801