Who is the "witness from the Children of Israel" mentioned in Surah Al-Ahqaf, Verse:10?

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. According my understanding, an Israelite testified something from the Qur'an as truth against unbelievers. Who was he and what exactly did he testify for? Or is my understanding about this verse incomplete/incorrect?