Commentaries:
Robertson's Word Pictures (NT)
Elijah must first come (Eleian dei elqein prwton). So this piece of theology concerned them more than anything else. They had just seen Elijah, but Jesus the Messiah had come before Elijah. The scribes used Malachi 4:5. Jesus had also spoken again of his death (resurrection). So they are puzzled.
Other Robertson's Word Pictures (NT) entries containing Matthew 17:10:
Mark 9:12
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