In shemot 3:18 Adonai commands Moshe to tell the King of Egypt: 'nelacha-na derech shloshet yamim bamidbar venizbecha laHaShem Eloheinu'-'let us go a journey of three days into the wilderness, to sacrifice before HaShem our G-d'.Shemot 5:3 describes this event, but Pharoh refuses to let them go. This is why Moshe repeats this message in 8:23.
Question to what was this three day journey (a way of three yamim long) refering to? (to which place or event?)
side notes:
After Pharoh let them go, the splitting of the Yam Suf etc. they arrive at the wilderniss, trafel for three days and arrive at Marah (Bamidbar 33:8).
Yom could also refer to a time period and the verse of 19:1 reads: BaChodesh Hashlishi.. after three months they arrived at the Midbar Sinai.
Pesach: the lamb kept for three days..