In Sanātana Hindu Dharma, SomaYajña is a group of the most complex and illustrious Vedic Yajña rituals integral to Vaidika Hindu Dharma since eternity. The Aitareya Āraṇyaka of ṚgVeda declares: “स एष यज्ञानां संपन्नतमो यत्सोमः एतस्मिन्ह्येताः पञ्च विधा अधिगम्यन्ते” (Ait. Ā. 2.3.3), hailing the SomaYajñas as the 'sampanatam', the most perfect of all Vedic rituals on account of its all-encompassing nature, thus containing in itself all Vedic yajñas.
SomaYajñas are consecrated to the enrichment, comprehensive well-being, enlightenment, yajamāna, the nation, and its inhabitants. The Supreme God Bhagavān Śrī Hari and various devatās are invoked and offered their ritualistic share, in return bestowing affluence, prosperity, strength, and spiritual merit upon the yajamāna and the whole community.
There exists a multitude of SomaYajñas, each distinguished by its unique set of procedures, hymns, protocols, outcomes, and significance, with the Agniṣṭoma serving as the foundational archetype for all Soma Sacrifices. The seven primary SomaYajñas: Agniṣṭoma, Atyagniṣṭoma, Ukthya, Ṣoḍaśī, Vājapeya, Atirātra, and Aptoryāma, are collectively designated as Soma-Saṃsthā.
All four Vedas declare “यज्ञो वै विष्णुः” hailing SomaYajña as Bhagavān’s own form. The Aitareya Brāhmaṇa of the ṚgVeda states “विष्णुर्वै यज्ञः”; and, the Śatapatha Brāhmaṇa further explains it with “यो वै विष्णुः स यज्ञः” and “स यः स विष्णुर्यज्ञ सः” clarifying that yajña is God Viṣṇu himself.
All four Vedas declare “यज्ञो वै विष्णुः” hailing SomaYajña as Bhagavān's own form. The Aitareya Brāhmaṇa of the ṚgVeda states “विष्णुर्वै यज्ञः”; and, the Śatapatha Brāhmaṇa further explains it with “यो वै विष्णुः स यज्ञः” and “स यः स विष्णुर्यज्ञ सः” clarifying that yajña is God Viṣṇu himself.
Jagadguru Śrī Vallabhācārya jī Mahāprabhu, further elucidating the śruti “यज्ञो वै विष्णुः”, explains in Subodhini jī 3.29.38, "यज्ञाधिष्ठात्री देवता विष्णुः 'यज्ञो वै विष्णुः' इति श्रुतेः" that Bhagavān Viṣṇu is indeed the presiding Deity of all yajñas.
The Gopatha Brāhmaṇa of Atharva Veda also says “विष्णुर्यज्ञो देवताश्चैव यज्ञं”, affirming that God Viṣṇu is both the yajña itself and the yajña's presiding deity. Bhagavān Śrī Kṛṣṇa declares in the Bhagavad Gītā 8.4 “अधियज्ञोऽहमेवात्र देहे देहभृतां वर॥” and again in Bhagavad Gītā 9.24 “अहं हि सर्वयज्ञानां भोक्ता च प्रभुरेव च” unequivocally implying that He alone is the sole enjoyer, master, and presiding deity of all yajñas.
Bhagavān Śrī Kṛṣṇa furthermore explained in Bhagavad Gītā 9.16 that he himself is the kratu, the sacrifice itself, the offering to the ancestors, the juice of the herbs, the Vedic mantra, the clarified butter, the sacrificial fire, and the very act of offering itself. Vallabhācārya jī Mahāprabhu thus concludes in his Bhāgavata MahāPuraṇa commentary, Subodhinī jī 2.10.24-25, “यज्ञो देवता स्वयमिति विष्णुः … अतः स्वयमेव यज्ञः स्वयमेव हव्यं।”, that Bhagavān Viṣṇu himself is also the sacrificial-offerings in the yajña.
Jagadguru Śrī Vallabhācārya jī Mahāprabhu in his treatise ŚāstrārthaPrakaraṇa ś. 11 states "यज्ञ रूपो हरिः पूर्वकाण्डे ब्रह्म तनुः परे। अवतारी हरीः कृष्णः श्रीभागवत ईर्यते॥" meaning that Śrī Hari is in the form of yajña in the Karma-kāṇḍa (the ritualistic section of the Vedas), in the form of Brahma in the jñāna-kāṇḍa (the knowledge section of the Vedas), and He incarnates as Śrī Kṛṣṇa, as explained in the Śrīmad Bhāgavatam.
In essence, the SomaYajñas are not just rituals; they are the self-embodiment of the Bhagavān Śrī Hari, representing a profound connection between the ceremonies and the divine reality, as emphasised throughout Vedic scriptures.
In the BhagavadGītā, Bhagavān Śrī Kṛṣṇa states, “यज्ञो दानं तपश् चैव पावनानि मनीषिणाम्” (BG 18.5), meaning that yajña, dāna to the qualified recipients, and tapas (penances as defined in scriptures) purify those who perform them without seeking personal gain.
Bhagavān Śrī Kṛṣṇa also classifies yajñas according to three guṇas – sātvika (noble in nature), rājasika (mediocre), and tāmasika (degraded). A yajña performed without desire for rewards, in accordance with Vedic injunctions, purely as a duty, and with the understanding that nothing else is to be gained, is called a sātvika yajña; whereas, a yajña performed for specific rewards and with vanity is called a rājasika yajña. A yajña performed without faith, against Vedic rules, without food distribution, with incorrect mantras, and without the prescribed (dakṣiṇā) is called a tāmasika yajña.