Exodus 19:2
For they were departed from Rephidim, and were come to the desert of Sinai, and had pitched in the wilderness; and there Israel camped before the mount.
Cross-reference
In Exodus 3:1, this same mountain (Horeb/Sinai) is where Moses saw the burning bush; now Israel arrives.
In Exodus 3:12, God promised Israel would serve Him on this mountain; here they arrive to fulfill that promise.
Exodus 17:1 records Israel leaving the Desert of Sin and camping at Rephidim, the previous stop before moving to Sinai in Exodus 19:2.
In Exodus 17:8, Amalek fought Israel at Rephidim, the place they left to come here.
In Exodus 18:5, Jethro visited Moses at the same mountain of God, showing Moses already there.
In Acts 7:38, Stephen recalls Moses receiving the law on Mount Sinai, where Israel now camps.
In Galatians 4:24, Paul uses Mount Sinai allegorically for the old covenant; this is the literal mountain of that covenant.
In Numbers 33:15, the same journey from Rephidim to the Wilderness of Sinai is recorded.
Deuteronomy 1:6 recalls the same encampment at Sinai, noting God's command to leave after a long stay.
In Acts 7:30, Stephen identifies the burning bush location as Mount Sinai, the same mountain here.
In Numbers 10:12, Israel later departs from the Wilderness of Sinai which they now enter.
In Numbers 33:14, the itinerary notes Rephidim, the campsite they left to come here.