Shiva Purana
हुत्वा शिष्यस्य तच्छेषं भोक्तुं समुपकल्पयेत् ॥ तर्पणांतं च मंत्राणां कृत्वा कर्म यथा पुरा ॥ १९ ॥
After offering oblations to the deity, one should arrange for the disciple to enjoy the remainder of the food. At the end of the tarpana the mantras were performed as before.
english translation
hutvA ziSyasya taccheSaM bhoktuM samupakalpayet ॥ tarpaNAMtaM ca maMtrANAM kRtvA karma yathA purA ॥ 19 ॥
hk transliteration by Sanscript