1 In the third month after the children of Israel had gone out of the land of Egypt, on that same day they came into the wilderness of Sinai.
Exodus 19:1 Cross References - WEB
Exodus 12:2
2 “This month shall be to you the beginning of months. It shall be the first month of the year to you.
Exodus 12:6
6 You shall keep it until the fourteenth day of the same month; and the whole assembly of the congregation of Israel shall kill it at evening.
Exodus 16:1
1 They took their journey from Elim, and all the congregation of the children of Israel came to the wilderness of Sin, which is between Elim and Sinai, on the fifteenth day of the second month after their departing out of the land of Egypt.
Leviticus 23:16-18
16 The next day after the seventh Sabbath you shall count fifty days; and you shall offer a new meal offering to Yahweh.
17 You shall bring out of your habitations two loaves of bread for a wave offering made of two tenths of an ephah of fine flour. They shall be baked with yeast, for first fruits to Yahweh.
18 You shall present with the bread seven lambs without defect a year old, one young bull, and two rams. They shall be a burnt offering to Yahweh, with their meal offering and their drink offerings, even an offering made by fire, of a sweet aroma to Yahweh.
Numbers 33:15
15 They traveled from Rephidim, and encamped in the wilderness of Sinai.