Brihat Parashara Hora Shastra
मन्दादयोऽपि हन्तारो भवेयुः पापिनो ग्रहाः । मेषलग्नोद्भवस्यैवं फलं ज्ञेयं द्विजोत्तम ॥ २२॥
Śukr is a direct (independent) killer. Śani etc. will also inflict death, if associated with an adverse Grah (Śukr).
english translation
mandAdayo'pi hantAro bhaveyuH pApino grahAH । meSalagnodbhavasyaivaM phalaM jJeyaM dvijottama ॥ 22॥
hk transliteration by Sanscript