en_tn_condensed/isa/31/01.md

go down to Egypt

The phrase "go down" is used here because Egypt is lower in Elevation than Jerusalem.

those who go down

"those people of Judah who go down"

lean on horses

"rely on their horses"

they are mighty

The word "mighty" here implies that they are mighty because there are so many of them.

nor do they seek Yahweh

"nor do they ask Yahweh to help them"