Mark 1:7 in the World English Bible
He preached, saying, “After me comes he who is mightier than I, the strap of whose sandals I am not worthy to stoop down and loosen.
Context
6 And John was clothed with camel’s hair, and with a girdle of a skin about his loins; and he did eat locusts and wild honey;
7 And preached, saying, There cometh one mightier than I after me, the latchet of whose shoes I am not worthy to stoop down and unloose.
8 I indeed have baptized you with water: but he shall baptize you with the Holy Ghost.