For Christ and the church, the binding agreement is the new covenant or testament. God the Father has entered into an everlasting covenant with His Son (Hebrews 13:20-21). The church is the bride-elect, including all who are born of the Spirit through faith in our Lord Jesus Christ.
The groom gave gifts to his bride-elect. Christ sends the Holy Spirit with gifts to the church. They are the three abiding gifts of faith, hope, and love (1 Corinthians 13:13). The greatest gift of all is love. "We love Him because He first loved us" (1 John 4:19). The church is the bride-elect. The elect includes all who are chosen by grace through faith in Christ.