Point 1: Elijah was known for wearing a garment of hair and a leather belt around his waist.

They replied, “He had a garment of hair and had a leather belt around his waist.” The king said, “That was Elijah the Tishbite.” (2 Kings 1:8)

Point 2: Elisha inherited a double portion of the spirit of Elijah.

When they had crossed, Elijah said to Elisha, “Tell me, what can I do for you before I am taken from you?”

“Let me inherit a double portion of your spirit,” Elisha replied.

“You have asked a difficult thing,” Elijah said, “yet if you see me when I am taken from you, it will be yours—otherwise, it will not.”

(2 Kings 2:9-10)

The company of the prophets from Jericho, who were watching, said, “The spirit of Elijah is resting on Elisha.” And they went to meet him and bowed to the ground before him. (2 Kings 2:15)

Point 3: Elijah ascended to heaven in a chariot of fire with horses of fire.

As they were walking along and talking together, suddenly a chariot of fire and horses of fire appeared and separated the two of them, and Elijah went up to heaven in a whirlwind. (2 Kings 2:11)

Point 4: Elijah was prophesied to reappear before the Messiah and turn the hearts of the parents to their children.

See, I will send the prophet Elijah to you before that great and dreadful day of the Lord comes. He will turn the hearts of the parents to their children, and the hearts of the children to their parents; or else I will come and strike the land with total destruction. (Malachi 4:5-6)

Point 5: John the Baptist came in the spirit and power of Elijah and turned the hearts of the parents to their children.

But the angel said to him: “Do not be afraid, Zechariah; your prayer has been heard. Your wife Elizabeth will bear you a son, and you are to call him John…And he will go on before the Lord, in the spirit and power of Elijah, to turn the hearts of the parents to their children and the disobedient to the wisdom of the righteous—to make ready a people prepared for the Lord.” (Luke 1:13-17)

Point 6: John the Baptist wore a garment of hair and a leather belt around his waist.

John’s clothes were made of camel’s hair, and he had a leather belt around his waist. (Matthew 3:4)

Point 7: John the Baptist denied being Elijah – the actual person.

Now this was John’s testimony when the Jewish leaders in Jerusalem sent priests and Levites to ask him who he was. He did not fail to confess, but confessed freely, “I am not the Messiah.” They asked him, “Then who are you? Are you Elijah?” He said, “I am not.” (John 1:19-21)

Point 8: Jesus confirmed that John the Baptist is the return of Elijah.

For all the Prophets and the Law prophesied until John. And if you are willing to accept it, he is the Elijah who was to come. (Matthew 11:13-14)

The disciples asked him, “Why then do the teachers of the law say that Elijah must come first?” Jesus replied, “To be sure, Elijah comes and will restore all things. But I tell you, Elijah has already come, and they did not recognize him, but have done to him everything they wished. In the same way the Son of Man is going to suffer at their hands.” Then the disciples understood that he was talking to them about John the Baptist. (Matthew 17:10-13)

Point 9: Until today, Jews cling to their literal interpretation and reject Jesus because Elijah did not literally return.

According to Biblical tradition, Elijah the prophet will reappear before the coming of the Messiah (Malachi 4:5‑6). In the Greek Testament, Jesus claims that John the Baptist was Elijah (Matthew 11:13‑14, 17:10‑13). However, when John the Baptist was asked if he was Elijah, he denied it (John 1:21). The Gospel of Luke 1:17 tries to get around this problem by claiming that John the Baptist came in the spirit of Elijah. (Jews for Judaism)

Similarly, Twelvers reject the Báb because the twelfth Imam did not literally return.