John 1:30
He is the One about whom I said, 'A man will come after me who ranks above me, for He existed before me.'
John 1:15
John gave testimony about Jesus, shouting out, "This person is the one about whom I said, 'He who will come after me ranks above me because He existed before me.'"
John 1:27
He is the One who will follow my ministry; [and] I do not deserve to untie his sandal lace."
Luke 3:16
John answered [their concerns] by saying to all of them, "I am [the one] immersing you in water, but One who is more powerful than I will follow my [ministry]. I am not [even] worthy to loosen the straps of His sandals. He will immerse you people with the Holy Spirit and with fire [i.e., the punishment of hell. See Matt. 3:10-12].