Manusmriti

siva.sh/manusmriti/3/204

तेषामारक्षभूतं तु पूर्वं दैवं नियोजयेत् । रक्षांसि विप्रलुम्पन्ति श्राद्धमारक्षवर्जितम् ॥ २०४ ॥

sanskrit

Let him first invite a (Brahmana) in honour of the gods as a protection for the (offering to the manes); for the Rakshasas destroy a funeral sacrifice which is left without such a protection.

english translation

teSAmArakSabhUtaM tu pUrvaM daivaM niyojayet | rakSAMsi vipralumpanti zrAddhamArakSavarjitam || 204 ||

hk transliteration by Sanscript