Matthew 6:24
No one can serve two masters; for either he will hate one, and love the other; or else he will cleave to one, and despise the other. Ye cannot serve God and mammon.
Colossians 3:22
Bondservants, obey in all things your masters according to the flesh, not with eyeservice, as menpleasers, but in singleness of heart, fearing the Lord.
1 John 2:15
Love not the world, nor the things in the world. If any one loveth the world, the love of the Father is not in him;
2 Peter 2:15-22
they have forsaken the right way, and have gone astray, following the way of Balaam the son of Bosor, who loved the wages of unrighteousness,