en_tn_condensed/mat/05/35.md

nor by the earth ... nor by Jerusalem

"do not swear by the earth ... and do not swear by Jerusalem." Jesus continues to name things that people should not swear by.

it is the footstool for his feet

This phrase means the earth also belongs to God. Alternate translation: "it is like a footstool where a king rests his feet"

for it is the city of the great King

"for it is the city that belongs to God, the great King"