This question highlights a foundational narrative variance between the Abrahamic scriptures.
The Hebrew Bible (Genesis 22) explicitly names Isaac as the son brought to Mount Moriah for the binding sacrifice. In contrast, while the Quranic text (Surah As-Saffat 37:100-113) does not explicitly name the sacrificial son, the vast majority of mainstream Islamic tradition identifies Ishmael as the intended sacrifice, pointing to the narrative timeline where Abraham is promised Isaac only after passing the ultimate test of his willingness to offer his firstborn.