'Whomever' in the Bible

Caleb announced, "I'll give my daughter Achsah in marriage to whomever leads the attack against Kiriath-sepher and captures it."

And Yahweh said to Gideon, "There [are] still too many troops; bring them down to the water, and I will sift through them for you there. For whomever I say to you, 'This [one] will go with you,' he will go with you; and for all whom I say to you, 'This [one] will not go with you,' he will not go."

Don't you control what your god Chemosh gives you? In the same way, we'll take control of whomever the LORD our God has driven out in front of us.