Mark 1:21

And they went into Capernaum; and straightway on the sabbath day he entered into the synagogue, and taught.

And they went into Capernaum (see the note at Matthew 4:13 ) and straightway on the sabbath day he entered into the synagogue, and taught, [ tois (G3588) sabbasin (G4521)]. This should have been rendered, 'straightway on the sabbaths He entered into the synagogue and taught,' or 'continued to teach.' The meaning is, that as He began this practice on the very first Sabbath after coming to settle at Capernaum, so He continued it regularly thereafter.