Rend. “according as I swear”: the ὡς correlating the oath and the disobedience.
They shall not enter into my rest (εἰ ἐλεύσονται εἰς τὴν κατάπαυσιν μου)
Lit. if they shall enter, etc. A common Hebraistic formula in oaths. Where God is speaking, as here, the ellipsis is “may I not be Jehovah if they shall enter.” Where man is speaking, “so may God punish me if”; or “God do so to me and more if.” Comp. Mar 8:12 : lxx, Gen 14:23; Deu 1:35; 1Ki 1:51; 1Ki 2:8. Sometimes the ellipsis is filled out, as 1Sa 3:17; 2Sa 3:35. Κατάπαυσιν rest, only in Hebrews, and Act 7:49. The verb καταπαύειν to lay to rest also only in Acts and Hebrews. In Class. the verb sometimes means to kill or to depose from power. In the original citation the reference is to Canaan. Paul uses κληρονομία inheritance in a similar sense.