NET
10 This is the one about whom it is written: ‘Look, I am sending my messenger ahead of you, who will prepare your way before you.’
Darby
10 this is he of whom it is written, Behold, *I* send my messenger before thy face, who shall prepare thy way before thee.
KJV
10 “For this is” [he], “of whom it is written, Behold, I send my messenger before thy face, which shall prepare thy way before thee.”