Mark 9:5

9:5 So Peter said to Jesus, “Rabbi, it is good for us to be here. Let us make three shelters – one for you, one for Moses, and one for Elijah.”

Mark 9:12

9:12 He said to them, “Elijah does indeed come first, and restores all things. And why is it written that the Son of Man must suffer many things and be despised?