International Standard Version When Moses went up on the mountain, he went into the center of the cloud and was on the mountain for 40 days and 40 nights.
American Standard Version And Moses entered into the midst of the cloud, and went up into the mount: and Moses was in the mount forty days and forty nights.
Young's Literal Translation and Moses goeth into the midst of the cloud, and goeth up unto the mount, and Moses is on the mount forty days and forty nights.
