These verses (Ps. 139:13-16) speak to the fact that God knew each one of us - even before our birth
13 For thou hast possessed my reins: thou hast covered me in my mother’s womb.
14 I will praise thee; for I am fearfully and wonderfully made: marvellous are thy works; and that my soul knoweth right well.
15 My substance was not hid from thee, when I was made in secret, and curiously wrought in the lowest parts of the earth.
16 Thine eyes did see my substance, yet being unperfect; and in thy book all my members were written, which in continuance were fashioned, when as yet there was none of them.