Matthew 14:28 YLT

²⁶  and the disciples having seen him walking upon the sea, were troubled saying -- 'It is an apparition,' and from the fear they cried out;

²⁷  and immediately Jesus spake to them, saying, 'Be of good courage, I am 'he', be not afraid.'

²⁸  And Peter answering him said, 'Sir, if it is thou, bid me come to thee upon the waters;'

²⁹  and he said, 'Come;' and having gone down from the boat, Peter walked upon the waters to come unto Jesus,

³⁰  but seeing the wind vehement, he was afraid, and having begun to sink, he cried out, saying, 'Sir, save me.'