Exodus 24:16-18

Webster_Strongs(i)
  16 H3519 And the glory H3068 of the LORD H7931 [H8799] abode H2022 upon mount H5514 Sinai H6051 , and the cloud H3680 [H8762] covered H8337 it six H3117 days H7637 : and the seventh H3117 day H7121 [H8799] he called H4872 to Moses H8432 from the midst H6051 of the cloud.
  17 H4758 And the sight H3519 of the glory H3068 of the LORD H398 [H8802] was like devouring H784 fire H7218 on the top H2022 of the mount H5869 in the eyes H1121 of the children H3478 of Israel.
  18 H4872 And Moses H935 [H8799] went H8432 into the midst H6051 of the cloud H5927 [H8799] , and he went up H2022 to the mount H4872 : and Moses H2022 was on the mount H705 forty H3117 days H705 and forty H3915 nights.