Deuteronomy 28:4

28:4 Your children will be blessed, as well as the produce of your soil, the offspring of your livestock, the calves of your herds, and the lambs of your flocks.

Deuteronomy 28:11

28:11 The Lord will greatly multiply your children, the offspring of your livestock, and the produce of your soil in the land which he promised your ancestors he would give you.

Exodus 23:26-33

23:26 No woman will miscarry her young or be barren in your land. I will fulfill the number of your days.

23:27 “I will send my terror before you, and I will destroy all the people whom you encounter; I will make all your enemies turn their backs to you. 23:28 I will send hornets before you that will drive out the Hivite, the Canaanite, and the Hittite before you. 23:29 I will not drive them out before you in one year, lest the land become desolate and the wild animals multiply against you. 23:30 Little by little I will drive them out before you, until you become fruitful and inherit the land. 23:31 I will set your boundaries from the Red Sea to the sea of the Philistines, and from the desert to the River, for I will deliver the inhabitants of the land into your hand, and you will drive them out before you.

23:32 “You must make no covenant with them or with their gods. 23:33 They must not live in your land, lest they make you sin against me, for if you serve their gods, it will surely be a snare to you.”

Leviticus 26:9

26:9 I will turn to you, make you fruitful, multiply you, and maintain my covenant with you.

Psalms 127:3

127:3 Yes, sons are a gift from the Lord,

the fruit of the womb is a reward.