Isaiah 40:4
2 “Speak kindly to Jerusalem and tell her that her time of warfare is over, that her punishment is completed. For the Lord has made her pay double for all her sins.” 3 A voice cries out, “In the wilderness clear a way for the Lord; build a level road through the rift valley for our God. 4 Every valley must be elevated and every mountain and hill leveled. The rough terrain will become a level plain, the rugged landscape a wide valley. 5 The splendor of the Lord will be revealed, and all people will see it at the same time. For the Lord has decreed it.” 6 A voice says, “Cry out!” Another asks, “What should I cry out?” The first voice responds: “All people are like grass, and all their promises are like the flowers in the field.
Zechariah 4:7
5 He replied, “Don’t you know what these are?” So I responded, “No, sir.” 6 Therefore he told me, “This is the Lord’s message to Zerubbabel: ‘Not by strength and not by power, but by my Spirit,’ says the Lord of Heaven’s Armies. 7 “What are you, you great mountain? Because of Zerubbabel you will become a level plain! And he will bring forth the temple capstone with shoutings of ‘Grace! Grace!’ because of this.” 8 Moreover, the Lord’s message came to me as follows: 9 “The hands of Zerubbabel have laid the foundations of this temple, and his hands will complete it. Then you will know that the Lord of Heaven’s Armies has sent me to you.
Notes and References
"... In the writings of two prophets, Isaiah and Zechariah, the image of topographical change symbolizes the intervention of God in human affairs. In Isaiah 40:4 the prophet announces that in preparation for the Lord’s coming “every valley shall be raised up, every mountain and hill made low; the rough ground shall become level, the rugged places a plain”. And in Zechariah, God’s angel announces that the “mountain” of opposition against Zerubbabel’s rebuilding of the temple will be leveled: “What are you, O mighty mountain? Before Zerubbabel, you will become level ground” (Zechariah 4:7). ..."
Ryken, Leland Dictionary of Biblical Imagery (pp. 2185-2186) InterVarsity Press, 1998