Parallel
Exodus 16:1
Brenton's English Septuagint · Berean Standard Bible
And they departed from Ælim, and all the congregation of the children of Israel came to the wilderness of Sin, which is between Ælim and Sina; and on the fifteenth day, in the second month after their departure from the land of Egypt,
On the fifteenth day of the second month after they had left the land of Egypt, the whole congregation of Israel set out from Elim and came to the Desert of Sin (note: The geographical name Sin is related to Sinai and should not be mistaken for the English word sin.), which is between Elim and Sinai.