Matthew 12:5

Or, have you not read in the law of Moses that the priests in the Temple defiled the Sabbath day [i.e., by doing the 'work' of offering sacrifices] and were not held guilty [of wrongdoing]? [See Num. 28:9-10]

John 7:22-23

[Now] Moses gave you [the ordinance of] circumcision and you circumcise a man on the Sabbath day. (Although it was [first] required by [your] forefathers, and not Moses).

Treasury of Scripture Knowledge

Summary

Or have ye not read in the law, how that on the sabbath days the priests in the temple profane the sabbath, and are blameless?

Bible References

On

John 7:22
[Now] Moses gave you [the ordinance of] circumcision and you circumcise a man on the Sabbath day. (Although it was [first] required by [your] forefathers, and not Moses).