Mark 9:2-8

After six days Jesus took Peter, James, and John and led them up a high mountain apart by themselves. And he was transfigured before them, and his clothes became dazzling white, such as no fuller on earth could bleach them. Then Elijah appeared to them along with Moses, and they were conversing with Jesus. Then Peter said to Jesus in reply, “Rabbi, it is good that we are here! Let us make three tents: one for you, one for Moses, and one for Elijah.” He hardly knew what to say, they were so terrified. Then a cloud came, casting a shadow over them; then from the cloud came a voice, “This is my beloved Son. Listen to him.” Suddenly, looking around, they no longer saw anyone but Jesus alone with them. The Coming of Elijah.