NET
25 But while John was completing his mission, he said repeatedly, ‘What do you think I am? I am not he. But look, one is coming after me. I am not worthy to untie the sandals on his feet!’
Darby
25 And as John was fulfilling his course he said, Whom do ye suppose that I am? *I* am not [he]. But behold, there comes one after me, the sandal of whose feet I am not worthy to loose.
KJV
25 And as John fulfilled his course, he said, Whom think ye that I am? I am not [he]. But, behold, there cometh one after me, whose shoes of [his] feet I am not worthy to loose.