Psalm 139:15
"My substance was not hid from thee, when I was made in secret, and curiously wrought in the lowest parts of the earth."
Cross References (ranked by relevance)
Ecclesiastes 11:5
18
As thou knowest not what is the way of the spirit, nor how the bones do grow in the womb of her that is with child: even so thou knowest not the works of God who maketh all.
Psalm 139:13
17
For thou hast possessed my reins: thou hast covered me in my mother’s womb.
Psalm 63:9
But those that seek my soul, to destroy it, shall go into the lower parts of the earth.