Explanation: Eliyahu told them, like it says in Eruvin (43a) "didn't Eliyahu say [these teachings]?"

Version #1: R. Tam's text does not say so.

Version #2: Some have the text, and explain that it refers to the above "I will lay your stone floor with gems, and your foundations with sapphire";

"Like this and like this" means that gems and sapphire [mentioned] above will be your windows.

Support: This is proven in the Pesikta. [It says] what is "Kadkod"? R. Aba said, it is k'Dein uch'Dein.

There, it does not discuss angels or Amora'im [so it cannot mean both opinions]! Rather, it refers to gems and sapphire.

Explanation: These are level gardens. They are built evenly, without protrusion or indentation deficiency in this (direction) or in this, like "Haloch v'Tafof Telachnah", and a measure that is not leveled off or heaping, which is called Tefufah.

Note: This is from the Aruch, who explains that the measure is exactly even. "Lo Mechukah" means that one did not level it off with a bar that sags in the middle and descends into the measure and removes some contents below the walls, which causes that the measure is deficient.

Explanation: Kafal are pillars made for towers or a tall building, like it says in the Agadic Midrash on Vayikra (Vayikra Rabah 21:2) "iron Kufla'os" (braces or chains), and (Vayikra Rabah 25:8) "just like pillars have braces above and bases below and they are in the middle, so Parshiyos in the Torah are expounded [based on] what is before them and after them."

Explanation (Riva): Mesirah must be from hand to hand.

Source #1: He brings a proof from Bava Metzi'a (8b) 'the word "Mesirah" is like one who hands over to his friend.'

Source #2: It says there also "Mesirah from a person acquires, but it does not acquire a Metzi'ah or property of a convert [who died without heirs], for who can hand over to him to acquire?!

Inference: We require Mesirah from hand to hand.

Rebuttal #1: Here [a Beraisa] teaches "he grabbed its hoof." This implies that he grabbed it by himself!

Also the Rashbam explained that he grabbed the hoof according to the seller's command (but the seller did not hand it over to him).

Rebuttal #2: It says below regarding Mesirah that whenever he said "go make Chazakah and acquire", all agree that he acquired.

If we require Mesirah from hand to hand, he should not have said "go make Chazakah and acquire", rather, "come, make Chazakah and acquire"!

Implied question: It says in Bava Metzi'a (8b) "like one who hands over to his friend"!

Answer: This means that he says to him "go make Chazakah and acquire."

Implied question: It says "regarding a Metzi'ah and a property of a convert, who can hand over to him"?!

Answer: This means 'who will say to him "go make Chazakah and acquire"', to enable him to acquire through merely holding it.

Question: [Rav can say that animals are different, for after uprooting a foreleg and hind leg, it is still in its place. This implies that uprooting all its legs suffices. If so,] why did [R. Acha] say "its full height", since it suffices to uproot its two forelegs and two hind legs!

Answer: Uprooting its forelegs and hind legs is called "its full height."