Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 40
Sanskrit:
षोडश्युक्थौ पूर्ववक्त्रात्पुरीष्यग्निष्टुतावथ ।आप्तोर्यामातिरात्रौ च वाजपेयं सगोसवम् ॥ ४० ॥
ITRANS:
ṣoḍaśy-ukthau pūrva-vaktrātpurīṣy-agniṣṭutāv athaāptoryāmātirātrau cavājapeyaṁ sagosavam
Translation:
All the different varieties of fire sacrifices [ṣoḍaśī, uktha, purīṣi, agniṣṭoma, āptoryāma, atirātra, vājapeya and gosava] became manifested from the eastern mouth of Brahmā.