New Living Translation
Then his disciples asked him, “Why do the teachers of religious law insist that Elijah must return before the Messiah comes?”

American Standard Version
And his disciples asked him, saying, Why then say the scribes that Elijah must first come?

Berean Study Bible
The disciples asked Him, “Why then do the scribes say that Elijah must come first?”

Douay-Rheims Bible
And his disciples asked him, saying: Why then do the scribes say that Elias must come first?

English Revised Version
And his disciples asked him, saying, Why then say the scribes that Elijah must first come?

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

World English Bible
His disciples asked him, saying, "Then why do the scribes say that Elijah must come first?"

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

Matthew 17:10 Additional Translations ...