حَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا ابْنُ أَبِي زَائِدَةَ، عَنْ أَبِي الأَشْهَبِ، عَنْ أَبِي نَضْرَةَ، عَنْ أَبِي سَعِيدٍ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ رَأَى فِي أَصْحَابِهِ تَأَخُّرًا فَقَالَ ‏"‏ تَقَدَّمُوا فَأْتَمُّوا بِي وَلْيَأْتَمَّ بِكُمْ مَنْ بَعْدَكُمْ لاَ يَزَالُ قَوْمٌ يَتَأَخَّرُونَ حَتَّى يُؤَخِّرَهُمُ اللَّهُ ‏"‏ ‏.‏

It wasnarrated from Abu Sa’eed that the Messenger of Allah (PBUH) sawthatsome of his Companions tended to stand in the rear, so he said: “Comeforward and follow me, and let those who are behind you followyourlead. If people continue to lag behind, Allah will put themback.” Translation Not Available

Book Ref: Sunan Ibn Majah Book 5 Hadith 978
Web Ref:  Sunan Ibn Majah Vol 1 Book 5 Hadith 978