'Olive trees' in the Bible

and two olive-trees are by it, one on the right of the bowl, and one on its left.'

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.

And I answer and say unto him, 'What are these two olive-trees, on the right of the candlestick, and on its left?'

And I replied a second [time] and asked him, "What [are] these two twigs of olive trees on the right of the lampstand and on its left?"