Which He promised in advance [long ago] through His prophets in the sacred Scriptures–
(which he had promised afore by his prophets in the holy scriptures,)
which he promised afore through his prophets in the holy scriptures,
God promised this good news about his Son ahead of time through his prophets in the holy scriptures. His Son was descended from David.
which he had promised beforehand, through his Prophets, in the Holy Scriptures,
Which he had promised before, by his prophets, in the holy scriptures,
