Verses with the word hallow in the Old Testament (15 verses):

Exodus 28:38
And it shall be upon Aaron's forehead, that Aaron may bear the iniquity of the holy things, which the children of Israel shall hallow in all their holy gifts; and it shall be always upon his forehead, that they may be accepted before the LORD.

Exodus 29:1
And this is the thing that thou shalt do unto them to hallow them, to minister unto me in the priest's office: Take one young bullock, and two rams without blemish,

Exodus 40:9
And thou shalt take the anointing oil, and anoint the tabernacle, and all that is therein, and shalt hallow it, and all the vessels thereof: and it shall be holy.

Leviticus 16:19
And he shall sprinkle of the blood upon it with his finger seven times, and cleanse it, and hallow it from the uncleanness of the children of Israel.

Leviticus 22:2
Speak unto Aaron and to his sons, that they separate themselves from the holy things of the children of Israel, and that they profane not my holy name in those things which they hallow unto me: I am the LORD.

Leviticus 22:3
Say unto them, Whosoever he be of all your seed among your generations, that goeth unto the holy things, which the children of Israel hallow unto the LORD, having his uncleanness upon him, that soul shall be cut off from my presence: I am the LORD.

Leviticus 22:32
Neither shall ye profane my holy name; but I will be hallowed among the children of Israel: I am the LORD which hallow you,

Leviticus 25:10
And ye shall hallow the fiftieth year, and proclaim liberty throughout all the land unto all the inhabitants thereof: it shall be a jubile unto you; and ye shall return every man unto his possession, and ye shall return every man unto his family.

Numbers 6:11
And the priest shall offer the one for a sin offering, and the other for a burnt offering, and make an atonement for him, for that he sinned by the dead, and shall hallow his head that same day.

1 Kings 8:64
The same day did the king hallow the middle of the court that was before the house of the LORD: for there he offered burnt offerings, and meat offerings, and the fat of the peace offerings: because the brasen altar that was before the LORD was too little to receive the burnt offerings, and meat offerings, and the fat of the peace offerings.

Jeremiah 17:22
Neither carry forth a burden out of your houses on the sabbath day, neither do ye any work, but hallow ye the sabbath day, as I commanded your fathers.

Jeremiah 17:24
And it shall come to pass, if ye diligently hearken unto me, saith the LORD, to bring in no burden through the gates of this city on the sabbath day, but hallow the sabbath day, to do no work therein;

Jeremiah 17:27
But if ye will not hearken unto me to hallow the sabbath day, and not to bear a burden, even entering in at the gates of Jerusalem on the sabbath day; then will I kindle a fire in the gates thereof, and it shall devour the palaces of Jerusalem, and it shall not be quenched.

Ezekiel 20:20
And hallow my sabbaths; and they shall be a sign between me and you, that ye may know that I am the LORD your God.

Ezekiel 44:24
And in controversy they shall stand in judgment; and they shall judge it according to my judgments: and they shall keep my laws and my statutes in all mine assemblies; and they shall hallow my sabbaths.