Zechariah 4:3

4:3 There are also two olive trees beside it, one on the right of the receptacle and the other on the left.” ¹ 

Revelation 11:4

11:4 (These are the two olive trees and the two lampstands that stand before the Lord of the earth.) ² 

¹ sn The vision apparently describes two olive trees providing olive oil by pipes to a large basin atop the menorah. From this basin two pipes extend to each of the seven lamps of the menorah, for a total of fourteen pipes in all. See vv. 11-12.

² sn This description is parenthetical in nature.