"There was a time before reason and science when my ancestors believed in all manner of nonsense, like the sher-Mal. The story goes that if a sher-Mal appears at the moment of death, she will take you to her dwelling in the stars."

In the beliefs of ancestors of the Tollan, sher-Mal are like the angels in the beliefs of the people on Earth. It used to be said that if a Tollan saw a Sher-mal as they died they would be taken to their dwelling in the stars. (SG1: "Enigma")