Luke 13:14-15
But the leader of the synagogue, indignant because Jesus had cured her on the Sabbath, answered the crowd, "There are six days on which people must work; so come on these and be cured, but not on the Sabbath."
John 5:16
This is why the Jews were persecuting Jesus, because He persisted in doing such things on the Sabbath.
Hebrews 2:2-3
For if the message spoken through angels proved to be valid, and every violation and infraction of it had its adequate penalty,
Hebrews 10:28-29
Anyone who breaks the law of Moses pays the death penalty without any show of pity, on the evidence of two or three witnesses only.