2 Kings 4:23

23And he said, “Why will you go to him today? It is neither anew moon nor Sabbath.” She said, “All is well.”

Amos 8:5

5saying, “When will bthe new moon be over,
that we may sell grain?
And cthe Sabbath,
that we may offer wheat for sale,
that we may make dthe ephah small and the shekel
An  ephah was about 3/5 bushel or 22 liters; a  shekel was about 2/5 ounce or 11 grams
great
and deal deceitfully with false balances,

Acts 15:21

21For from ancient generations Moses has had in every city those who proclaim him, ffor he is read every Sabbath in the synagogues.”

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