Genesis 18:10

and he saith, 'returning I return unto thee, about the time of life, and lo, to Sarah thy wife a son.'

Genesis 21:2

and Sarah conceiveth, and beareth a son to Abraham, to his old age, at the appointed time that God hath spoken of with him;

Genesis 17:21

and My covenant I establish with Isaac, whom Sarah doth bear to thee at this appointed time in the next year;'

Genesis 17:19

and God saith, 'Sarah thy wife is certainly bearing a son to thee, and thou hast called his name Isaac, and I have established My covenant with him, for a covenant age-during, to his seed after him.

Genesis 16:10

and the messenger of Jehovah saith to her, 'Multiplying I multiply thy seed, and it is not numbered from multitude;'

Genesis 17:16

and I have blessed her, and have also given to thee a son from her; and I have blessed her, and she hath become nations -- kings of peoples are from her.'

Genesis 18:13-14

and Sarah laugheth in her heart, saying, 'After I have waxed old I have had pleasure! -- my lord also is old!'

Genesis 22:15-16

And the messenger of Jehovah calleth unto Abraham a second time from the heavens,

Judges 13:3-5

and a messenger of Jehovah appeareth unto the woman, and saith unto her, 'Lo, I pray thee, thou art barren, and hast not borne; when thou hast conceived, then thou hast borne a son.

2 Kings 4:16-17

and he saith, 'At this season, according to the time of life, thou art embracing a son;' and she saith, 'Nay, my lord, O man of God, do not lie unto thy maid-servant.'

Luke 1:13

and the messenger said unto him, 'Fear not, Zacharias, for thy supplication was heard, and thy wife Elisabeth shall bear a son to thee, and thou shalt call his name John,

Romans 9:8-9

that is, the children of the flesh -- these are not children of God; but the children of the promise are reckoned for seed;

Galatians 4:23

but he who is of the maid-servant, according to flesh hath been, and he who is of the free-woman, through the promise;

Galatians 4:28

And we, brethren, as Isaac, are children of promise,

Treasury of Scripture Knowledge

Summary

And he said, I will certainly return unto thee according to the time of life; and, lo, Sarah thy wife shall have a son. And Sarah heard it in the tent door, which was behind him.

Bible References

He said

Genesis 18:13
and Sarah laugheth in her heart, saying, 'After I have waxed old I have had pleasure! -- my lord also is old!'
Genesis 16:10
and the messenger of Jehovah saith to her, 'Multiplying I multiply thy seed, and it is not numbered from multitude;'
Genesis 22:15
And the messenger of Jehovah calleth unto Abraham a second time from the heavens,

According

Genesis 17:21
and My covenant I establish with Isaac, whom Sarah doth bear to thee at this appointed time in the next year;'
Genesis 21:2
and Sarah conceiveth, and beareth a son to Abraham, to his old age, at the appointed time that God hath spoken of with him;
2 Kings 4:16
and he saith, 'At this season, according to the time of life, thou art embracing a son;' and she saith, 'Nay, my lord, O man of God, do not lie unto thy maid-servant.'

Lo, sarah

Genesis 17:16
and I have blessed her, and have also given to thee a son from her; and I have blessed her, and she hath become nations -- kings of peoples are from her.'
Genesis 21:2
and Sarah conceiveth, and beareth a son to Abraham, to his old age, at the appointed time that God hath spoken of with him;
Judges 13:3
and a messenger of Jehovah appeareth unto the woman, and saith unto her, 'Lo, I pray thee, thou art barren, and hast not borne; when thou hast conceived, then thou hast borne a son.
Luke 1:13
and the messenger said unto him, 'Fear not, Zacharias, for thy supplication was heard, and thy wife Elisabeth shall bear a son to thee, and thou shalt call his name John,
Romans 9:8
that is, the children of the flesh -- these are not children of God; but the children of the promise are reckoned for seed;
Galatians 4:23
but he who is of the maid-servant, according to flesh hath been, and he who is of the free-woman, through the promise;