Sunan Ibn Majah, Volume 5, Book 37, Hadith 4287 (DarusSalam) ⓘ
It was narrated from Bahz bin Hakim, from his father, that his grandfather said: “The Messenger of Allah said: ‘On the Day of Resurrection, we will complete seventy nations, of whom we are the last and the best.’”
حَدَّثَنَا عِيسَى بْنُ مُحَمَّدِ بْنِ النَّحَّاسِ الرَّمْلِيُّ، وَأَيُّوبُ بْنُ مُحَمَّدٍ الرَّقِّيُّ، قَالاَ حَدَّثَنَا ضَمْرَةُ بْنُ رَبِيعَةَ، عَنِ ابْنِ شَوْذَبٍ، عَنْ بَهْزِ بْنِ حَكِيمٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " نُكْمِلُ يَوْمَ الْقِيَامَةِ سَبْعِينَ أُمَّةً نَحْنُ آخِرُهَا وَخَيْرُهَا " .
also referenced under: Hadith 4287 (Reference) & Book 37, Hadith 4428 (In-Book)