James 3:14

3:14 But if you have bitter jealousy and selfishness in your hearts, do not boast and tell lies against the truth.

James 5:5

5:5 You have lived indulgently and luxuriously on the earth. You have fattened your hearts in a day of slaughter.

sn James’ point seems to be that instead of seeking deliverance from condemnation, they have defied God’s law (fattened your hearts) and made themselves more likely objects of his judgment (in a day of slaughter).