Mammon

Matthew 6:24 No one is able to serve two masters. For either he would hate the one and would love the other, or he would endure the one and despise the other. You are not able to serve Yahweh and riches!

Mammon is the name of the Syrian god of wealth, in the CNT translation of Matthew it is translated as 'riches'. One cannot strive to amass wealth, and have a care for the will of God. While working to become rich, what are you doing for your brethren, or to your brethren?