John Gill Commentary Ezekiel 9:8

"And it came to pass, while they were smiting, and I was left, that I fell upon my face, and cried, and said, Ah Lord Jehovah! wilt thou destroy all the residue of Israel in thy pouring out of thy wrath upon Jerusalem?" — Ezekiel 9:8 (ASV)

And it came to pass, while they were slaying them that were in the city: and I was left in the temple; and the only one that was left there, the rest were slain; for there were none marked in the temple, only in the city, (Ezekiel 9:4).

As a supplicant, with great humility: and cried, and said:

Being greatly distressed with this awful providence: ah, Lord God! will you destroy all the residue of Israel?

The ten tribes had been carried captive before; there only remained the two tribes of Judah and Benjamin, and these were now threatened with an utter destruction:

in your pouring out of your fury upon Jerusalem? Shown in the destruction of men, both in the city and temple, by famine, pestilence, and sword.