Acts 2:39

For the promise is to you, and your children, and to all that are afar off, as many as the Lord our God shall call.

Acts 3:25-26

You are the sons of the prophets, and of the covenant that God made with our fathers, saying to Abraham, And in your offspring shall all the families of the earth be blessed.

Romans 4:16

Therefore, the inheritance is by faith, that it may be according to grace, in order that the promise may be sure to all his posterity, not to those only who are of the law, but to those, also, who are of the faith of Abraham, who is the father of us all,

Romans 9:7-8

Nor, because they are the posterity of Abraham, are they all children: but in Isaac shall your posterity be called.

1 Corinthians 15:58

Therefore, my be loved brethren, be firm, immovable, always abounding in the work of the Lord; for you know that your labor is not in vain in the Lord.

Galatians 3:29

And if you are Christ s, then you are Abraham's posterity, and heirs according to the promise.

Treasury of Scripture Knowledge

Summary

They shall not labour in vain, nor bring forth for trouble; for they are the seed of the blessed of the LORD, and their offspring with them.

Bible References

Shall

1 Corinthians 15:58
Therefore, my be loved brethren, be firm, immovable, always abounding in the work of the Lord; for you know that your labor is not in vain in the Lord.

For

Acts 2:39
For the promise is to you, and your children, and to all that are afar off, as many as the Lord our God shall call.
Acts 3:25
You are the sons of the prophets, and of the covenant that God made with our fathers, saying to Abraham, And in your offspring shall all the families of the earth be blessed.
Romans 4:16
Therefore, the inheritance is by faith, that it may be according to grace, in order that the promise may be sure to all his posterity, not to those only who are of the law, but to those, also, who are of the faith of Abraham, who is the father of us all,
Romans 9:7
Nor, because they are the posterity of Abraham, are they all children: but in Isaac shall your posterity be called.
Galatians 3:29
And if you are Christ s, then you are Abraham's posterity, and heirs according to the promise.