Mark 1:7-8
Mark 1:7-8 AMP
And he was preaching, saying, “After me comes He who is mightier [more powerful, more noble] than I, and I am not worthy to stoop down and untie the straps of His sandals [even as His slave]. As for me, I baptized you [who came to me] with water [only]; but He will baptize you [who truly repent] with the Holy Spirit.”