Verses with the word offspring in the Old Testament (9 verses):

Job 5:25
Thou shalt know also that thy seed shall be great, and thine offspring as the grass of the earth.

Job 21:8
Their seed is established in their sight with them, and their offspring before their eyes.

Job 27:14
If his children be multiplied, it is for the sword: and his offspring shall not be satisfied with bread.

Job 31:8
Then let me sow, and let another eat; yea, let my offspring be rooted out.

Isaiah 22:24
And they shall hang upon him all the glory of his father's house, the offspring and the issue, all vessels of small quantity, from the vessels of cups, even to all the vessels of flagons.

Isaiah 44:3
For I will pour water upon him that is thirsty, and floods upon the dry ground: I will pour my spirit upon thy seed, and my blessing upon thine offspring:

Isaiah 48:19
Thy seed also had been as the sand, and the offspring of thy bowels like the gravel thereof; his name should not have been cut off nor destroyed from before me.

Isaiah 61:9
And their seed shall be known among the Gentiles, and their offspring among the people: all that see them shall acknowledge them, that they are the seed which the LORD hath blessed.

Isaiah 65:23
They shall not labour in vain, nor bring forth for trouble; for they are the seed of the blessed of the LORD, and their offspring with them.