# He proclaimed
"John proclaimed"
# the strap of his sandals I am not worthy to stoop down and untie
John was comparing himself to a servant to show how great the one to come would be. Alternate translation: "I am not even worthy to do the lowly task of removing his shoes" (See: [[rc://en/ta/man/jit/figs-metaphor]])
# the strap of his sandals
People often wore sandals that were made of leather and were tied to their feet with leather straps.
# stoop down
"bend down"