Matthew 11:10

This is the one about whom it is written: ‘Behold, I will send My messenger ahead of You, who will prepare Your way before You.’

Note Malachi 3:1

For this is he, of whom it is written, Behold, I send my messenger before thy face, which shall prepare thy way before thee.

For this is he, of whom it is written, ‘Behold, I send my messenger before your face, who will prepare your way before you.’

This is he, of whom it is written, Behold, I send my messenger before thy face, Who shall prepare thy way before thee.