Mark 1:
1 The beginning of the good news of Jesus Christ.

2 As it is written in the prophets,
'See, I am sending my messenger ahead of you,
who will prepare your way;
3 the voice of one crying out in the wilderness:
"Prepare the way of the Lord,
make his paths straight"',

Mark 1:
4 John the baptizer appeared in the wilderness, proclaiming a baptism of repentance for the forgiveness of sins. 5 And people from the whole Judean countryside and all the people of Jerusalem were going out to him, and were baptized by him in the river Jordan, confessing their sins. 6 Now John was clothed with camel's hair, with a leather belt around his waist, and he ate locusts and wild honey. 7 He proclaimed, 'The one who is more powerful than I is coming after me; I am not worthy to stoop down and untie the thong of his sandals. 8 I have baptized you with water; but he will baptize you with the Holy Spirit.'

NIV

2 Kings 1:
8 They replied, "He was a man with a garment of hair and with a leather belt around his waist."
The king said, "That was Elijah the Tishbite."

Mark 6:
14 King Herod heard of it, for Jesus' name had become known. Some were saying, 'John the baptizer has been raised from the dead; and for this reason these powers are at work in him.' 15 But others said, 'It is Elijah.' And others said, 'It is a prophet, like one of the prophets of old.' 16 But when Herod heard of it, he said, 'John, whom I beheaded, has been raised.'

2 Kings 2:
7 Fifty men of the company of prophets also went, and stood at some distance from them, as they both were standing by the Jordan. 8 Then Elijah took his mantle and rolled it up, and struck the water; the water was parted to the one side and to the other, until the two of them crossed on dry ground.

9 When they had crossed, Elijah said to Elisha, 'Tell me what I may do for you, before I am taken from you.' Elisha said, 'Please let me inherit a double share of your spirit.' 10 He responded, 'You have asked a hard thing; yet, if you see me as I am being taken from you, it will be granted you; if not, it will not.' 11 As they continued walking and talking, a chariot of fire and horses of fire separated the two of them, and Elijah ascended in a whirlwind into heaven. 12 Elisha kept watching and crying out, 'Father, father! The chariots of Israel and its horsemen!' But when he could no longer see him, he grasped his own clothes and tore them in two pieces.

13 He picked up the mantle of Elijah that had fallen from him, and went back and stood on the bank of the Jordan. 14 He took the mantle of Elijah that had fallen from him, and struck the water, saying, 'Where is the Lord, the God of Elijah?' When he had struck the water, the water was parted to the one side and to the other, and Elisha went over.

15 When the company of prophets who were at Jericho saw him at a distance, they declared, 'The spirit of Elijah rests on Elisha.' They came to meet him and bowed to the ground before him.

Mark 9:
9 As they were coming down the mountain, he ordered them to tell no one about what they had seen, until after the Son of Man had risen from the dead. 10 So they kept the matter to themselves, questioning what this rising from the dead could mean. 11 Then they asked him, 'Why do the scribes say that Elijah must come first?' 12 He said to them, 'Elijah is indeed coming first to restore all things. How then is it written about the Son of Man, that he is to go through many sufferings and be treated with contempt? 13 But I tell you that Elijah has come, and they did to him whatever they pleased, as it is written about him.'