John Gill Commentary Ezekiel 9:3

"And the glory of the God of Israel was gone up from the cherub, whereupon it was, to the threshold of the house: and he called to the man clothed in linen, who had the writer`s inkhorn by his side." — Ezekiel 9:3 (ASV)

And the glory of the God of Israel was gone up from the cherub ,
whereupon he was
That is, the glorious God of Israel; or the glorious Shechinah, and divine Majesty, which dwelt between the cherubim over the mercy seat in the most holy place, removed from thence, as a token of his being about to depart from the temple, which in a short time would be destroyed. The Targum is, ``the glory of the God of Israel departed in the cherub on which he dwelt, in the house of the holy of holies;'' the cherubim removed with him, and were his chariot in which he rode; see (Ezekiel 10:18) (11:22) ;

to the threshold of the house ;
of the holy of holies, as Jarchi interprets it; and so was nearer to the brasen altar, where the seven men stood, to give them their orders; of which an account follows:

and he called to the man clothed with linen, which [had] the writer's
inkhorn by his side ;
he, being the principal person, is called first; and his business being to preserve the Lord's people shows that this was the first care of God.