Galatians 3:16
But the promises were made to Abraham and "to his offspring." He doth not say, "and to offsprings," as speaking of many, but, as speaking of one, "and to thy offspring," which is Christ.
Romans 9:8
That is, not the children by natural descent are children of God, but the children to whom the promise is made are accounted as the offspring.
Galatians 4:28
But ye, brethren, as Isaac was, are children of a promise.
Hebrews 11:13
These all died in faith, not having received the promised blessings, but having seen them from afar, and greeted them, and having professed that they were strangers and sojourners on the earth.