A double minded man is unstable in all his ways.
James 4:8
Draw nigh to God, and he will draw nigh to you. Cleanse your hands, ye sinners; and purify your hearts, ye double minded.
1 Kings 18:21
And Elijah came unto all the people, and said, How long halt ye between two opinions? if the LORD be God, follow him: but if Baal, then follow him. And the people answered him not a word.
2 Kings 17:33
They feared the LORD, and served their own gods, after the manner of the nations whom they carried away from thence.
2 Kings 17:41
So these nations feared the LORD, and served their graven images, both their children, and their children's children: as did their fathers, so do they unto this day.
Isaiah 29:13
Wherefore the Lord said, Forasmuch as this people draw near me with their mouth, and with their lips do honour me, but have removed their heart far from me, and their fear toward me is taught by the precept of men:
Hosea 7:8-11
8
Ephraim, he hath mixed himself among the people; Ephraim is a cake not turned.
9
Strangers have devoured his strength, and he knoweth it not: yea, gray hairs are here and there upon him, yet he knoweth not.
10
And the pride of Israel testifieth to his face: and they do not return to the LORD their God, nor seek him for all this.
11
Ephraim also is like a silly dove without heart: they call to Egypt, they go to Assyria.
Hosea 10:2
Their heart is divided; now shall they be found faulty: he shall break down their altars, he shall spoil their images.
Matthew 6:22
The light of the body is the eye: if therefore thine eye be single, thy whole body shall be full of light.
Matthew 6:24
No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.
2 Peter 2:14
Having eyes full of adultery, and that cannot cease from sin; beguiling unstable souls: an heart they have exercised with covetous practices; cursed children:
2 Peter 3:16
As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction.