Matthew 3:3 & Isaiah 40:3
¥Isaiah is speaking of preparing the way for the LORD, that is, Jehovah.
¥Matthew applies this to John the Baptist preparing the way for Jesus (see verses 11-12).
11 (NIV) "I baptize you with water for repentance. But after me will come one who is more powerful than I, whose sandals I am not fit to carry. He will baptize you with the Holy Spirit and with fire. 12 His winnowing fork is in his hand, and he will clear his threshing floor, gathering his wheat into the barn and burning up the chaff with unquenchable fire."