Ezek 9:2

9:2 clothed in linen. Linen garments were worn by priests (Ex. 28:31–42), but angels and those in the presence of God were also so described (Dan. 10:5; 12:6, 7; Rev. 15:6; 19:8, 14).

a writing case. This man is a scribe, apparently charged with keeping the heavenly record (Ex. 32:32, 33; Ps. 69:28; 139:16; Dan. 12:1; Phil. 4:3; Rev. 3:5; 13:8; 17:8; 20:12, 15; 21:27). Ezekiel’s vision is a reminder that idolaters have no place in the city of God (1 Cor. 5:11; 6:9; Eph. 5:5; Rev. 21:8; 22:15).