G4279–προεπαγγέλλω–proepangellō

(which he had before promised by his prophets in holy writings,)

προεπηγγείλατο proepēngeilato “He promised beforehand”

I thought it necessary therefore to beg the brethren that they would come to you, and complete beforehand your fore-announced blessing, that this may be ready thus as blessing, and not as got out of you.

προεπηγγελμένην proepēngelmenēn “having pre-promised”