Zechariah 4:5-6

Then the angel who was speaking with me answered me, “Do you not know what these are?” And I said, “No, my lord.” Then he said to me, “This [continuous supply of oil] is the word of the LORD to Zerubbabel [prince of Judah], saying, ‘Not by might, nor by power, but by My Spirit [of whom the oil is a symbol],’ says the LORD of hosts.