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.
Colossians 3:22
Ye servants, obey your masters according to the flesh in all things; not with eye-service, pleasing men, but of purity of heart, fearing the Lord.
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:
2 Peter 2:15-22
leaving the straight way, they have wandered off, following in the way of Balaam the son of Bosor, who loved the reward of iniquity; and had the conviction of his own conscience: