And it came to pass, while they were slaying them, and I was left, that I fell upon my face, and cried, and said, Ah Lord GOD! wilt thou destroy all the residue of Israel in thy pouring out of thy fury upon Jerusalem?
While they were slaying them, and I was left - literally, 'there was left I.' So universal scented the slaughter that Ezekiel thought himself the only one left (Calvin). He was the only one left of the priests 'in the sanctuary.'
I fell upon my face - to intercede for my countrymen (so Moses and Aaron "fell upon their faces" to intercede for the general congregation, when God was wroth on account of Korah's sin, Numbers 16:22).
Wilt thou destroy all the residue of Israel? - a plea drawn from God's covenant promise to save the elect remnant.