Manusmriti

siva.sh/manusmriti/5/65

गुरोः प्रेतस्य शिष्यस्तु पितृमेधं समाचरन् । प्रेतहारैः समं तत्र दशरात्रेण शुध्यति ॥ ६५ ॥

sanskrit

A pupil who performs the Pitrimedha for his deceased teacher, becomes also pure after ten days, just like those who carry the corpse out (to the burial-ground).

english translation

guroH pretasya ziSyastu pitRmedhaM samAcaran | pretahAraiH samaM tatra dazarAtreNa zudhyati || 65 ||

hk transliteration by Sanscript