Exodus 24:13-15

Young's Literal Translation

¹³ And Moses riseth -- Joshua his minister also -- and Moses goeth up unto the mount of God;

¹⁴ and unto the elders he hath said, `Abide ye for us in this [place], until that we turn back unto you, and lo, Aaron and Hur [are] with you -- he who hath matters doth come nigh unto them.'

¹⁵ And Moses goeth up unto the mount, and the cloud covereth the mount;