7-100 Muhammad ibn al-Hassan - may God be pleased with him - narrated that Ahmad ibn Idris quoted Muhammad ibn Ahmad, on the authority of Muhammad ibn Hisan, on the authority of Abi Muhammad al-Razi, on the authority of Al-Hussein ibn Yazid al-Nawfaly, on the authority of Al-Sakoony, on the authority of Ja’far ibn Muhammad (MGB), on the authority of his father (MGB) that God’s Prophet (MGB) said,

“Whoever cuts off his nails and shaves his moustache on Saturdays or Thursdays shall be immune from toothache and eye pains.”