yes its dogma and practice by christians
jesus told his disciples to commemorate his death by taking holy communion which after his resurrection was called "agape feasts"
> Luke 22:20 Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you.
>Luke 22:19 ¶ And he took bread, and gave thanks, and brake it, and gave unto them, saying, This is my body which is given for you: this do in remembrance of me.
>Romans 6:4 Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life.
>Ephesians 4:5 One Lord, one faith, one baptism,
>Colossians 2:12 Buried with him in baptism, wherein also ye are risen with him through the faith of the operation of God, who hath raised him from the dead.
>1 Peter 3:21 The like figure whereunto even baptism doth also now save us (not the putting away of the filth of the flesh, but the answer of a good conscience toward God,) by the resurrection of Jesus Christ:
baptism doesnt save you but its a sign that you are saved and ditto for communion
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