Under section "Duties of a House Holder", verse 3.81, Manu Smriti says: स्वाध्यायेनार्चयेतऋषीन् होमैर्देवान् यथाविधि । पितॄंश्राद्धैश्च नॄनन्नैर्भूतानि बलिकर्मणा ॥ ८१ ॥ One should worship, according to law, the Sages by Vedic Study, the Gods by Homa-offerings, the Pitṛs by Śrāddha offerings, t...