Matthew 6:24
No man can serve two masters: for either he will hate the one and love the other, or he will cleave to the one and neglect the other.
Colossians 3:22
Servants, obey in all things your masters according to the flesh; not with eye-service, as men-pleasers, but in singleness of heart, fearing God.
1 John 2:15
Love not the world, neither the things that are in the world: if any one love the world, the love of the Father is not in him.
2 Peter 2:15-22
Who have forsaken the right way and are gone astray, following the way of Balaam, the son of Boser, who loved the reward of unrighteousness.