Judges 11:31

“Then it shall be, that whatsoever cometh forth of the doors of my house to meet me, etc.] If this phrase, “to meet me”, is meant intentionally, then no other than an human creature can be meant; a child, or servant, or any other of mankind; for none else could come forth with a design to meet him: but if this is to be understood eventually, of what might meet him, though not with design, then any other creature may be intended; and it must be meant what came forth first, as the Vulgate Latin version expresses it, or otherwise many might come forth at such a time: when I return in peace from the children of Ammon: safe in his own person, and having conquered the Ammonites, and restored peace…”

“whatsoever cometh forth of the doors of my house to meet me--This evidently points not to an animal, for that might have been a dog; which, being unclean, was unfit to be offered; but to a person, and it looks extremely as if he, from the first, contemplated a human sacrifice. Bred up as he had been, beyond the Jordan, where the Israelitish tribes, far from the tabernacle, were looser in their religious sentiments, and living latterly on the borders of a heathen country where such sacrifices were common, it is not improbable that he may have been so ignorant as to imagine that a similar immolation would be acceptable to God. His mind, engrossed with the prospect of a contest, on the issue of…”

“The words of this verse prove conclusively that Jephthah intended his vow to apply to human beings, not animals: for only one of his household could be expected to come forth from the door of his house to meet him. They also preclude any other meaning than that Jephthah contemplated a human sacrifice. This need not, however, surprise us, when we recollect his Syrian birth and long residence in a Syrian city, where such fierce rites were probably common. The Syrians and Phoenicians were conspicuous among the ancient pagan nations for human sacrifices, and the transfer, under such circumstances, to Yahweh of the rites with which the false gods were honored, is just what one might expect. The…”

“whatsoever: etc. Heb. that which cometh forth, which shall come forth shall surely: Lev 27:2, Lev 27:3, Lev 27:28, Lev 27:29; Sa1 1:11, Sa1 1:28, Sa1 2:18, Sa1 14:24, Sa1 14:44; Psa 66:13, Psa 66:14 and I will: or, or I will, etc. Wehaaleetheehoo olah, rather, as Dr. Randolph and others contend, "and I will offer Him (or to Him, i.e., Jehovah) a burnt offering;" for hoo may with much more propriety be referred to the person to whom the sacrifice was to be made, than to the thing to be sacrificed. Unless understood in this way, or as the marginal reading, it must have been the vow of a heathen or a madman. If a dog, or other uncleaned animal had met him, he could not have made it a burnt…”