who opposes and exalts himself above every so-called god (theon | θεόν | acc sg masc) or object of worship, so that he takes his seat in the temple of God (theou | θεοῦ | gen sg masc), proclaiming that he himself is God (theos | θεός | nom sg masc).
Reference
2 Thessalonians 2:4
Sequence
853