Samuele Bacchiocchi continues his defense of the creational origin of the Sabbath by looking at Hebrews 4:4.
Bacchiocchi sees this as the most explicit reference to the creation Sabbath found in Hebrews because two Old Testament texts (Genesis 2:2 and Psalm 95:11) are welded together. Geneses 2:2 traces the Sabbath back to the creation and Psalm 95:11 "includes the blessings of salvation" that are found in entering God's rest. (Hebrews 4:3, 5, 10).