ENOfficial
Mu'adh b, Jabal reported God’s Messenger as saying, “Observe this prayer when it is dark, for by it you have been made superior to all the peoples, no people having observed it before you”. Abu Dawud transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ مُعَاذِ بْنِ جَبَلٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: " أَعْتِمُوا بِهَذِهِ الصَّلَاةِ فَإِنَّكُمْ قَدْ فُضِّلْتُمْ بِهَا عَلَى سَائِرِ الْأُمَمِ وَلَمْ تُصَلِّهَا أُمَّةٌ قَبْلَكُمْ. رَوَاهُ أَبُو دَاوُد
sunnah.com