COMMENTARY on 19:54
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.
Commentary:

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.

 

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,
Commentary:
39  After the mention of Moses, who descended from Abraham through Isaac, we are reminded of Ishmael, Abraham's first-born son and the progenitor of the "northern" group of Arab tribes, and thus of the Prophet Muhammad, who descended in direct line, through the tribe of Quraysh, from Ishmael.