Brihat Parashara Hora Shastra
षष्ठाष्टमव्यये मन्दे नीचे वाऽस्तङ्गतेऽपि वा । विषशस्त्रादिपीडा च स्थाभ्रंशं महद्भयम् ॥ ५७॥
If Śani is in Ari, Randhr, or Vyaya, in his debilitation Rāśi, or combust, there will be during his Dasha ill effects from poison, injury from weapons
english translation
SaSThASTamavyaye mande nIce vA'staGgate'pi vA । viSazastrAdipIDA ca sthAbhraMzaM mahadbhayam ॥ 57॥
hk transliteration by Sanscript