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