On the third new moon after the people of Israel had gone out of the land of Egypt, on that day they came into the wilderness of Sinai.
They set out from Rephidim and came into the wilderness of Sinai, and they encamped in the wilderness. There Israel encamped before the mountain, while Moses went up to God.
The Lord called to him out of the mountain, saying, “Thus you shall say to the house of Jacob, and tell the people of Israel:
‘You yourselves have seen what I did to the Egyptians, and how I bore you on eagles’ wings and brought you to myself.
Now therefore, if you will indeed obey my voice and keep my covenant, you shall be my treasured possession among all peoples, for all the earth is mine;
and you shall be to me a kingdom of priests and a holy nation.’ These are the words that you shall speak to the people of Israel.”
So Moses came and called the elders of the people and set before them all these words that the Lord had commanded him.
All the people answered together and said, “All that the Lord has spoken we will do.”
-Exodus 19:1-8 (ESV)