Exodus 19:2

19:2 After they journeyed from Rephidim, they came to the Desert of Sinai, and they camped in the desert; Israel camped there in front of the mountain.

Exodus 28:17

28:17 You are to set in it a setting for stones, four rows of stones, a row with a ruby, a topaz, and a beryl – the first row;

Exodus 34:3

34:3 No one is to come up with you; do not let anyone be seen anywhere on the mountain; not even the flocks or the herds may graze in front of that mountain.”