Cross-referencesExplore similar Bible verses on Hebrews 7:21 in New International Version "but he became a priest with an oath when God said to him: ‘The Lord has sworn and will not change his mind: “You are a priest for ever.” ’" Ps 110:4 The Lord has sworn and will not change his mind: ‘You are a priest for ever, in the order of Melchizedek.’