1)
What is the meaning of "Nosei Minchah"?
1.
Targum Yonasan (Shmuel II, 8:2): Natlei Peras. Radak (ibid.) - i.e. they paid a known tax every year. Malbim (ibid.) - it says [there] that kept a third alive. He kept the Giborim alive, to pay a tax.


