"And indeed, among the People of the Scripture are those who believe in Allah"—meaning: those among them who have believed—"and in what was revealed to you and what was revealed to them, being humbly submissive to Allah." Al-khushu' (humble submission) is the constant fear [of Allah] settled in the heart. Qatadah said: It was mentioned to us that this was revealed regarding the Negus (al-Najashi) and a group of his companions who believed in the Prophet of Allah, peace and blessings of Allah be upon him.
﴿وَإِنَّ مِنْ أَهْلِ الْكِتَابِ لَمَنْ يُؤمن بِاللَّه﴾ يَعْنِي: من آمن مِنْهُم ﴿وَمَا أُنْزِلَ إِلَيْكُمْ وَمَا أُنْزِلَ إِلَيْهِمْ خاشعين لله﴾ الْخُشُوع: المخافة الثَّابِتَة فِي الْقلب. قَالَ قَتَادَة: ذكر لنا؛ أَنَّهَا نزلت فِي النَّجَاشِيّ وأناس من أَصْحَابه؛ آمنُوا بِنَبِي الله ﷺ.