Jer 17:13, 1 Cor 16:22
In the Old Testament, God said that those who turn away from God in their hearts will be cursed. (Jeremiah 17:5, Jer 17:13)
Jeremiah 17:5 Thus saith the Lord; Cursed be the man that trusteth in man, and maketh flesh his arm, and whose heart departeth from the Lord.
Jer 17:13 O Lord, the hope of Israel, all that forsake thee shall be ashamed, and they that depart from me shall be written in the earth, because they have forsaken the Lord, the fountain of living waters.
Cursed is anyone who does not love Christ Jesus. (1 Corinthians 16:22)
1 Corinthians 16:22 If any man love not the Lord Jesus Christ, let him be Anathema Maranatha.