Matthew 6:24
No one is able to serve two masters: for he will hate the one, and love the other; or cleave to the one, and despise the other. You are not able to serve God and mammon.
Luke 16:13
No servant is able to serve two masters: for he will hate the one, and love the other; or he will cleave to the one, and despise the other. You are not able to serve God and mammon.
2 Thessalonians 2:11-12
And on this account God sends to them the working of delusion, that they should believe a lie:
James 1:8
the double-minded man, the most unstable in all his ways.
James 4:4
O adulteresses, do you not know that the friendship of the world is enmity to God? Whosoever therefore may wish to be the friend of the world renders himself the enemy of God.
1 John 2:15
Love not the world, nor the things that are in the world. If any one loves the world, the love of the Father is not in him:
Revelation 3:15-16
I know your works, that you are neither cold nor hot. I would that you were either cold or hot.