remember what the specific issue was in the context of the discussion with beta.
The issue is taking a verse, a single verse, Genesis 26 5 and saying from that that Abraham did not do physical work on the Sabbath.
5 Because that Abraham obeyed my voice, and kept my charge, my commandments, my statutes, and my laws.
Beta isn't assuming, as you do, that for some unknown, unwritten reason, God excluded His Sabbath from His Commandments, Statutes and Laws given to Abraham. Neither Beta, nor I, nor several others on this Forum speculate, or assume, that God secretly hid His Sabbath Commandment from Abraham.
You are free to assume so if you please, but it is you who are "Assuming and speculating" not Beta. She believe the Word when He says "I am God, I change not".
I think taking this verse
Genesis 2: 1. Thus the heavens and the earth were finished, and all the host of them. 2. And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made. 3. And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made.
and the leaping from that to Abraham did not do physical work on the Sabbath is a great leap.
And I think it is the pinnacle of foolishness to believe God didn't share with His Children an event in which He stopped everything He was doing, and chose a specific day to rest, to bless and Sanctify and MAKE HOLY. And why did He do this? For Himself, or for man? My Savior, the Light that God sent for me, said He created His Sabbath for man.
Was Adam a man? Was Noah? Was Abraham?
Did Abraham know Jesus? Did he know of the Passover?
Gen. 22:
8 And Abraham said, My son,
God will provide himself a lamb for a burnt offering: so they went both of them together.
So it is a great leap, in my opinion, to assume Jesus shared His Passover, His Laws, His Commandments, with Abraham, but not the Sabbath He created for man.