Genesis 36:24 - Matthew Poole's English Annotations on the Holy Bible

Mules; so most understand the word Jemim, which is no where else used, and give this sense of it, that he found out the way of the generation of mules by the copulation of a horse and a mare. Others render it waters, that he found out some springs of water, which in those hot countries were rare and precious; or hot waters, some hot and medicinal springs. But the Chaldee renders it giants, and the Samaritan version Emims, a sort of giants mentioned Deuteronomy 2:10,11; who also were neighbours to the Horites here spoken of, as appears from Genesis 14:5,6; and therefore might, according to the manner of those times, make inroads one upon another. So Jemim is put for Emim, either by an apocope of the first letter, or by the change of the Hebrew letter Jod into Aleph, both which are frequent among the Hebrews. And the sense is, that Anah the Horite found out the Emims; that is, he met with them, or came upon them suddenly, and smote them. In this sense the word finding is oft used, as Judges 1:5 1 Samuel 31:3 Psalms 21:8 Isaiah 10:10.