Hebrews 10:12-14

whereas Christ, having offered the one sacrifice [the all-sufficient sacrifice of Himself] for sins for all time, SAT DOWN [signifying the completion of atonement for sin] AT THE RIGHT HAND OF GOD [the position of honor], waiting from that time onward UNTIL HIS ENEMIES ARE MADE A FOOTSTOOL FOR HIS FEET. [Ps 110:1] For by the one offering He has perfected forever and completely cleansed those who are being sanctified [bringing each believer to spiritual completion and maturity].