{And a few of the later ones.} This means: that those who preceded from all the nations are more numerous than those who preceded from the nation of Muhammad.
Arabic (Source)
﴿وَقَلِيل من الآخرين﴾ يَعْنِي: أَن سابقي جَمِيع الْأُمَم أَكثر من سابقي أمة محمدٍ
