In the third month after the departure of the children of Israel out of the land of Egypt, the same day came they [into] the wilderness of Sinai:
they departed from Rephidim, and came [into] the wilderness of Sinai, and encamped in the wilderness; and Israel encamped there before the mountain.
And Moses went up to God, and Jehovah called to him out of the mountain, saying, Thus shalt thou say to the house of Jacob, and tell the children of Israel:
Ye have seen what I have done to the Egyptians, and [how] I have borne you on eagles' wings and brought you to myself.
And now, if ye will hearken to my voice indeed and keep my covenant, then shall ye be my own possession out of all the peoples -- for all the earth is mine --
References for Exodus 19:5
and ye shall be to me a kingdom of priests, and a holy nation. These are the words which thou shalt speak to the children of Israel.