From the recordings Lesmahagow Conference 2023 and Ephesians

Adoption book ends God's programme of redemption in the Old Testament from Passover under the leadership of Moses and Purim as the consequence of the bravery of Esther. Both of these OT heroes were adopted. Adoption brings privelage, responsibility and dignity, providing access into every spiritual blessing in heavenly places in Christ.
Ephesians chapter 1, bible teaching.
Dr J Stewart Gillespie