A. Yusuf Ali:Translation:
Also mention in the Book (the story of) Isma´il: He
was (strictly) true to what he promised, 2506 and he
was a messenger (and) a prophet.

Muhammad Asad:Translation:
AND CALL to mind, through this divine writ, Ishmael. 39 Behold, he was always true to his promise, and was an apostle [of God], a prophet,
2506 Isma'il was Dhadih Allah, i.e., the chosen sacrifice of Allah in Muslim tradition. When Abraham told him of the sacrifice, he voluntarily offered himself for it, and never flinched from his promise, until the sacrifice was redeemed by the substitution of a ram under Allah's commands. He was the fountainhead of the Arabian Ummah, and in his posterity came the Prophet of Allah. The Ummah and the Book of Islam reflect back the prophethood on Isma'il.