What is "Tachtav" referring to?
Rashi: It is referring (not to what is underneath the Merkav, but) to the Merkav that is underneath the Zav, to teach us that, as opposed to Mishkav and Moshav, Merkav renders Tamei Adam, but not the clothes that he is wearing.
What is the latter half of the Pasuk - "ve'ha'Nosei osam ... " coming to teach us?
Rashi #1: One who carries anything mentioned about a Zav (as well the Zav himself - Rashi in Sabbos, 82b) - his Zivus, his spit, his Zera and his urine, his Mishkav and even his Merkav, he and the clothes become Tamei.
Rashi #2 (in Shabbos, 82b): It is referring to Even Mesama - If a Zav is sitting on a large stone that is supported by four posts and touches Keilim underneath it, the Keilim are Tamei. 1
What is the word "ve'ha'Nosei osam" coming to preclude?
Nidah, 55a: It precludes E'ven Mesame 1 from Elyono shel Zav - "Osam", 've'Lo Even Mesame'.
QUESTIONS ON RASHI
Rashi writes that our Pasuk discusses carrying? a Zav's, spit? In Nidah (55b), the Gemara learns Tum'as Masa of his spit from another Pasuk!
Moshav Zekenim: Our Pasuk teaches only about the last things mentioned - Mishkav and Moshav.


