Original sentence: Since Isaac was Abraham's second son,  Muslims argue there was no time at which he would have been Abraham's "only son", and that this implies that there was an original text which must have named Ishmael rather than Isaac as the intended sacrifice.The Qur'an itself does not specify by name which son he nearly sacrificed (Quran 37:99-111)
Edited sentence: Since Isaac was Abraham's second son, there was no time at which he would have been Abraham's only son, so this implies that the original text must have named Ishmael rather than Isaac as the intended sacrifice.The Qur'an itself does not exactly specify by name which son he nearly sacrificed (Quran 37:99-111) but Ishmael is implied