Śrāddha-kalpa: Dāna-phala-nirdeśa
Gifts in Śrāddha and Their Fruits
तानि सर्वाण्यवाप्नोति श्राद्धे दत्त्वा तु मानवः / नित्यश्राद्धे तु यो दद्यात्प्रयतस्तत्परायणः
tāni sarvāṇyavāpnoti śrāddhe dattvā tu mānavaḥ / nityaśrāddhe tu yo dadyātprayatastatparāyaṇaḥ
By giving in the śrāddha, a person obtains all those fruits; and one who, careful and devoted, performs the daily śrāddha should likewise give.