Verses with the word seal in the Old Testament (10 verses):

1 Kings 21:8
So she wrote letters in Ahab's name, and sealed them with his seal, and sent the letters unto the elders and to the nobles that were in his city, dwelling with Naboth.

Nehemiah 9:38
And because of all this we make a sure covenant, and write it; and our princes, Levites, and priests, seal unto it.

Esther 8:8
Write ye also for the Jews, as it liketh you, in the king's name, and seal it with the king's ring: for the writing which is written in the king's name, and sealed with the king's ring, may no man reverse.

Job 38:14
It is turned as clay to the seal; and they stand as a garment.

Job 41:15
His scales are his pride, shut up together as with a close seal.

Canticles 8:6
Set me as a seal upon thine heart, as a seal upon thine arm: for love is strong as death; jealousy is cruel as the grave: the coals thereof are coals of fire, which hath a most vehement flame.

Isaiah 8:16
Bind up the testimony, seal the law among my disciples.

Jeremiah 32:44
Men shall buy fields for money, and subscribe evidences, and seal them, and take witnesses in the land of Benjamin, and in the places about Jerusalem, and in the cities of Judah, and in the cities of the mountains, and in the cities of the valley, and in the cities of the south: for I will cause their captivity to return, saith the LORD.

Daniel 9:24
Seventy weeks are determined upon thy people and upon thy holy city, to finish the transgression, and to make an end of sins, and to make reconciliation for iniquity, and to bring in everlasting righteousness, and to seal up the vision and prophecy, and to anoint the most Holy.

Daniel 12:4
But thou, O Daniel, shut up the words, and seal the book, even to the time of the end: many shall run to and fro, and knowledge shall be increased.