Mark 8:10-13

immediately got into the boat with His disciples, and came to the region of Dalmanutha. Then the Pharisees came out and began to dispute with Him, seeking from Him a sign from heaven, testing Him. But He sighed deeply in His spirit, and said, “Why does this generation seek a sign? Assuredly, I say to you, no sign shall be given to this generation.” And He left them, and getting into the boat again, departed to the other side.