it-1 p. 524 Covenant - The purpose of the new covenant requires that it continue in operation until all of the “Israel of God” are resurrected to immortality in the heavens.
it-1 p. 525 Covenant - The covenant remains operative between Jesus Christ and these associate kings forever.
w80 7/1 p. 31 - Likewise, the new covenant will come to its end when all the anointed ones are resurrected to heavenly immortal life.
w79 4/1 p. 31 - The new covenant will terminate with the glorification of the remnant who are today in that covenant mediated by Christ.