Genesis 17
Young's Literal Translation (YLT)
25 and Ishmael his son `is' a son of thirteen years in the flesh of his foreskin being circumcised;
World English Bible (WEB)
25 Ishmael, his son, was thirteen years old when he was circumcised in the flesh of his foreskin.
American Standard-ASV1901 (ASV)
25 And Ishmael his son was thirteen years old, when he was circumcised in the flesh of his foreskin.