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. His glory is like the firstling of his bullock - This similitude is very obscure. A bullock was the most excellent of animals among the Jews, not only because of its acceptableness in sacrifice to God, but because of its great usefulness in agriculture. There is something peculiarly noble and dignified in the appearance of the ox, and his greatest ornament are his fine horns; these the inspired penman has particularly in view, as the following clause proves; and it is well known that in Scriptural language horns are the emblem of strength, glory, and sovereignty; Psalms 75:5, Psalms 75:10; Psalms 89:17, Psalms 89:24; Psalms 112:9; Daniel 8:3, etc.; Luke 1:69; Revelation 17:3, etc.
His horns are like the horns of unicorns - ראם reem, which we translate unicorn, from the μονοκερως monokeros of the Septuagint, signifies, according to Bochart, the mountain goat; and according to others, the rhinoceros, a very large quadruped with one great horn on his nose, from which circumstance his name is derived. See the notes on Numbers 23:22; Numbers 24:8. Reem is in the singular number, and because the horns of a unicorn, a one-horned animal, would have appeared absurd, our translators, with an unfaithfulness not common to them, put the word in the plural number.
To the ends of the earth - Of the land of Canaan, for Joshua with his armies conquered all this land, and drove the ancient inhabitants out before him.
They are the ten thousands of Ephraim, etc. - That is, The horns signify the ten thousands of Ephraim, and the thousands of Manasseh. Jacob prophesied, Genesis 48:19, that the younger should be greater than the elder; so here Tens of thousands are given to Ephraim, and only thousands to Manasseh. See the census, Numbers 1:33-35 (note).