24And when he had given thanks, he brake it, and said, Take, eat:
this is my body, which is broken for you: this do in remembrance of me.
25After the same manner also he took the cup, when he had supped, saying,
This cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.
1 Corinthians 5:7 (KJV)
Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened.
For even Christ our passover is sacrificed for us:
1 Corinthians 5:8 (KJV)
Therefore let us keep the feast, not with old leaven, neither with the leaven of malice and wickedness;
but with the unleavened bread of sincerity and truth.
Acts 12:3 (KJV)
And because he saw it pleased the Jews, he proceeded further to take Peter also.
(Then were the days of unleavened bread.)
Acts 20:6 (KJV)
And we sailed away from Philippi after (the days of unleavened bread),
and came unto them to Troas in five days; where we abode seven days.
we are told to keep the feast day, first day of unleavened bread once a year.