3-80 Al-Hassan ibn Ahmad ibn Idris - may God have Mercy upon him - quoted his father, on the authority of Muhammad ibn Ahmad, on the authority of Muhammad ibn Ali al-Hamedany who linked it up through a chain of narrators to Davood ibn Farqad, on the authority of either Abi Ja’far al-Baqir (MGB) or Aba Abdullah as-Sadiq (MGB)
“Three groups of people are not pure: Those whose right eye is blind; those whose pupils are like the stone on a ring, and those who are born as Sindi (in some versions we read: those who have been born after one year of pregnancy.) ”