Malachi 4:4 – 6

New International Version (NIV)

⁴ “Remember the law of my servant Moses, the decrees and laws I gave him at Horeb for all Israel.

⁵ “See, I will send the prophet Elijah to you before that great and dreadful day of the LORD comes. ⁶ 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.”

From BibleGateway.com: http://www.biblegateway.com/passage/?search=Malachi 4:4-6&version=NIV
NIV®