Children are indeed a heritage from the LORD, and the fruit of the womb is His reward.

Genesis 1:28
God blessed them and said to them, "Be fruitful and multiply, and fill the earth and subdue it; rule over the fish of the sea and the birds of the air and every creature that crawls upon the earth."

Genesis 25:21
Later, Isaac prayed to the LORD on behalf of his wife, because she was barren. And the LORD heard his prayer, and his wife Rebekah conceived.

Genesis 33:5
When Esau looked up and saw the women and children, he asked, "Who are these with you?" Jacob answered, "These are the children God has graciously given your servant."

Genesis 48:4
and told me, 'Behold, I will make you fruitful and multiply you; I will make you a multitude of peoples, and will give this land to your descendants after you as an everlasting possession.'

Deuteronomy 7:13
He will love you and bless you and multiply you. He will bless the fruit of your womb and the produce of your land--your grain, new wine, and oil, the young of your herds and the lambs of your flocks--in the land that He swore to your fathers to give you.

Deuteronomy 28:4
The fruit of your womb will be blessed, as well as the produce of your land and the offspring of your livestock--the calves of your herds and the lambs of your flocks.

Joshua 24:3
But I took your father Abraham from beyond the Euphrates and led him through all the land of Canaan, and I multiplied his descendants. I gave him Isaac,

Joshua 24:4
and to Isaac I gave Jacob and Esau. I gave Esau Mount Seir to possess, but Jacob and his sons went down to Egypt.

Psalm 113:9
He settles the barren woman in her home as a joyful mother to her children. Hallelujah!

Isaiah 13:18
Their bows will dash young men to pieces; they will have no mercy on the fruit of the womb; they will not look with pity on the children.

See, children are an heritage of the LORD: and the fruit of the womb is his reward.