'Only one, only child' — 'take your son, your ONLY ONE' (22:2, 12, 16). Ishmael was sent away one chapter before, so Isaac is now the only son of the covenant; the word also means 'darling, precious' (Psalm 22:20 uses it for one's own life). KJV 'only son'; the Septuagint's agapēton, 'beloved,' set up the baptism echo. → first discussed at Gen 22:2