Starfleet oath
From Memory Alpha, the free Star Trek reference
The Starfleet oath is an oath taken by all Starfleet officers. Part of it is a vow to "seek out life."
Captain Kathryn Janeway was appalled at Captain Rudolph Ransom's murdering of innocent aliens to get his ship home, reminding him that he took an oath as a Starfleet officer "to seek out life, not destroy it!" (VOY: "Equinox")
