These are not “the sons of the kingdom ” but, rather,“ a great crowd ” of willing subjects of that Kingdom. They are harvested from among all “peoples, national groups and languages. ”
وَهؤُلَاءِ لَيْسُوا ‹ بَنِي ٱلْمَلَكُوتِ › ،‏ بَلْ « جَمْعٌ كَثِيرٌ » مِنَ ٱلرَّعَايَا ٱلطَوْعِيِّينَ لِهذَا ٱلْمَلَكُوتِ يُجْمَعُونَ مِنْ بَيْنِ كُلِّ « ٱلشُّعُوبِ وَٱلْأُمَمِ وَٱلْأَلْسِنَةِ » .‏