'Shoe latchet' in the Bible

that I will not take of all that is thine, so much as a thread or a shoe latchet, lest thou shouldest say 'I have made Abram rich.'

and preached, saying, "A stronger than I cometh after me, whose shoe latchet I am not worthy to stoop down and unloose.

John answered and said to them all, "I baptise you with water, but a stronger than I cometh after me, whose shoe latchet I am not worthy to unloose: he will baptise you with the holy ghost, and with fire,

He it is that cometh after me, which was before me, whose shoe latchet I am not worthy to unloose."