The following verses are from the King James Bible.
God brought them out of Egypt; he hath as it were the strength of an unicorn.
God brought him forth out of Egypt; he hath as it were the strength of an unicorn: he shall eat up the nations his enemies, and shall break their bones, and pierce them through with his arrows.
His glory is like the firstling of his bullock, and his horns are like the horns of unicorns: with them he shall push the people together to the ends of the earth: and they are the ten thousands of Ephraim, and they are the thousands of Manasseh.
Will the unicorn be willing to serve thee, or abide by thy crib?
Canst thou bind the unicorn with his band in the furrow? or will he harrow the valleys after thee?
Save me from the lion’s mouth: for thou hast heard me from the horns of the unicorns.
He maketh them also to skip like a calf; Lebanon and Sirion like a young unicorn.
But my horn shalt thou exalt like the horn of an unicorn: I shall be anointed with fresh oil.
And the unicorns shall come down with them, and the bullocks with the bulls; and their land shall be soaked with blood, and their dust made fat with fatness.
The following verses are from the Douay-Rheims 1899 American Edition.
Save me from the lion’s mouth; and my lowness from the horns of the unicorns.
And shall reduce them to pieces, as a calf of Libanus, and as the beloved son of unicorns.
And he built his sanctuary as of unicorns, in the land which he founded for ever.
But my horn shall be exalted like that of the unicorn: and my old age in plentiful mercy.
And the unicorns shall go down with them, and the bulls with the mighty: their land shall be soaked with blood, and their ground with the fat of fat ones.
…unicorns refer to a real but mysterious animal in existence? The Hebrew word re’em was translated as monokeros (Greek Septuagint) which was translated as unicornis (Latin Vulgate) which was translated as unicorn in English. Unicorn is “one horn.” Then consider the Latin rhinoceros, from Ancient Greek ῥινόκερως (rhinokerōs), composed of ῥίς (rhis, “nose”) + κέρας (kéras, “horn”). Maybe monokeros and rhinokeros are really referring to the same beast. Interesting.