Matthew 17:10

And his disciples questioned him, saying, 'Why then do the scribes say that Elijah it behoveth to come first?'

Matthew 11:14

and if ye are willing to receive it, he is Elijah who was about to come;

Malachi 4:5-6

Lo, I am sending to you Elijah the prophet, Before the coming of the day of Jehovah, The great and the fearful.

Matthew 17:3-4

and lo, appear to them did Moses and Elijah, talking together with him.

Matthew 27:47-49

And certain of those standing there having heard, said -- 'Elijah he doth call;'

Mark 9:11

And they were questioning him, saying, that the scribes say that Elijah it behoveth to come first.

John 1:21

And they questioned him, 'What then? Elijah art thou?' and he saith, 'I am not.' -- 'The prophet art thou?' and he answered, 'No.'

John 1:25

and they questioned him and said to him, 'Why, then, dost thou baptize, if thou art not the Christ, nor Elijah, nor the prophet?'

Treasury of Scripture Knowledge

Summary

And his disciples asked him, saying, Why then say the scribes that Elias must first come?

General references

Bible References

Why

Matthew 17:3
and lo, appear to them did Moses and Elijah, talking together with him.
Matthew 11:14
and if ye are willing to receive it, he is Elijah who was about to come;
Matthew 27:47
And certain of those standing there having heard, said -- 'Elijah he doth call;'
Malachi 4:5
Lo, I am sending to you Elijah the prophet, Before the coming of the day of Jehovah, The great and the fearful.
Mark 9:11
And they were questioning him, saying, that the scribes say that Elijah it behoveth to come first.
John 1:21
And they questioned him, 'What then? Elijah art thou?' and he saith, 'I am not.' -- 'The prophet art thou?' and he answered, 'No.'

General references

Mark 9:11
And they were questioning him, saying, that the scribes say that Elijah it behoveth to come first.
Luke 9:8
and by certain, that Elijah did appear, and by others, that a prophet, one of the ancients, was risen;