Mark 9:35

9:35 After he sat down, he called the twelve and said to them, “If anyone wants to be first, he must be last of all and servant of all.”

Mark 14:72

14:72 Immediately a rooster crowed a second time. Then Peter remembered what Jesus had said to him: “Before a rooster crows twice, you will deny me three times.” And he broke down and wept.