You shall keep the feast of unleavened bread: (you shall eat unleavened bread seven days, as I commanded you, in the time appointed of the month Abib; for in it you came out from Egypt: and none shall appear before me empty:)
All Commentaries on Exodus 23:15 Go To Exodus 23
John Chrysostom
AD 407
“You shall not appear before the Lord empty,” that is, enter not into the temple without sacrifices. Now if it is not right to go into the house of God without sacrifices, much more ought we to enter the assembly accompanied by our brethren. For this sacrifice and offering is better than that, when you bring a soul with you into the church.