Judges 11:30

30 And Jephthah vowed a vow to the LORD, and said, If thou shalt without fail deliver the children of Ammon into my hands,

Judges 11:30 Meaning and Commentary

Judges 11:30

And Jephthah vowed a vow unto the Lord
Before he set out for the land of the children of Ammon, and to fight with them; hoping that such a religious disposition of mind would be regarded by the Lord, and be acceptable to him, and he should be blessed with success in his enterprise:

and said, if thou shall without fail deliver the children of Ammon into
mine hands;
though he was assured of the justness of his cause, and of his call to engage in it, he seems to have some little diffidence in his mind about the success of it; at least, was not fully certain of it.

Judges 11:30 In-Context

28 But, the king of the children of Ammon hearkened not to the words of Jephthah which he sent him.

29 Then the Spirit of the LORD came upon Jephthah, and he passed over Gilead, and Manasseh, and passed over Mizpeh of Gilead, and from Mizpeh of Gilead he passed over [to] the children of Ammon.

30 And Jephthah vowed a vow to the LORD, and said, If thou shalt without fail deliver the children of Ammon into my hands,

31 Then it shall be, that whatever cometh out of the doors of my house to meet me, when I return in peace from the children of Ammon, shall surely be the LORD'S, and I will offer it for a burnt-offering.

32 So Jephthah passed over to the children of Ammon to fight against them; and the LORD delivered them into his hands.