The word(s) "israel" appears 44 time(s) in 42 verse(s) in Quran in Muhammad Pickthal translation.

(41) And when Jesus son of Mary said: O Children of israel! Lo! I am the messenger of Allah unto you, confirming that which was (revealed) before me in the Torah, and bringing good tidings of a messenger who cometh after me, whose name is the Praised One. Yet when he hath come unto them with clear proofs, they say: This is mere magic.

(42) O ye who believe! Be Allah's helpers, even as Jesus son of Mary said unto the disciples: Who are my helpers for Allah? They said: We are Allah's helpers. And a party of the Children of israel believed, while a party disbelieved. Then We strengthened those who believed against their foe, and they became the uppermost.