Aśauca-vidhi (Rules of Impurity) within Śrāddha-kalpa — Chapter on Testing/Selecting Brahmanas and Honoring the Atithi
देवाश्च पितरश्चैव तेमेवान्तर्हिता द्विजम् / आविश्य विप्रं मोक्ष्यन्ति लोकानुग्रहकारणात्
devāśca pitaraścaiva temevāntarhitā dvijam / āviśya vipraṃ mokṣyanti lokānugrahakāraṇāt
O twice-born one, the Devas and the Pitṛs, though unseen, enter that brāhmaṇa and, for the welfare of the world, grant him liberation.