Qur'an 46:10 is as follows:

Say, "Have you considered: if the Qur'an was from Allah , and you disbelieved in it while a witness from the Children of Israel has testified to something similar and believed while you were arrogant... ?" Indeed, Allah does not guide the wrongdoing people. [1]

According my understanding, a person from Israelites testified something from the Qur'an as truth against unbelievers.

Who was he and what exactly did he testify for? Or is my understand about this verse incomplete/incorrect?