"And among the People of the Scripture is he who, if you entrust him with a great amount [of wealth], he will return it to you"—meaning: he who has believed among them.
﴿وَمِنْ أَهْلِ الْكِتَابِ مَنْ إِنْ تأمنه بقنطار يؤده إِلَيْك﴾ يَعْنِي: مَنْ آمَنَ مِنْهُمْ.