Where is the Sunday Mass obligation in the Bible?

My son asked me this question and I’m not sure I answered it correctly.

Hi,

One of the Ten Commandments states: Remember to keep Holy the Sabbath (Exodus 20:8). Very early in the Church the Sabbath (which is Saturday) was replaced by Sunday as the Lord’s day because on Easter Sunday, our Blessed Lord arose from the dead.

Fr. Vincent Serpa, O.P.

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