Verses with the word beautify in the Old Testament (3 verses):

Ezra 7:27
Blessed be the LORD God of our fathers, which hath put such a thing as this in the king's heart, to beautify the house of the LORD which is in Jerusalem:

Psalms 149:4
For the LORD taketh pleasure in his people: he will beautify the meek with salvation.

Isaiah 60:13
The glory of Lebanon shall come unto thee, the fir tree, the pine tree, and the box together, to beautify the place of my sanctuary; and I will make the place of my feet glorious.