Ramayana
अग्निष्टोमो ऽश्वमेधश्च यज्ञो बहुसुवर्णकः । राजसूयस्तथा यज्ञो गोमेधो वैष्ववस्तथा ॥ 7-25-8 ॥
The Agnishtoma, the Ashvamedha (horse-sacrifice), the sacrifice abounding in gold, the Rajasuya sacrifice, and likewise the Gomedha and the Vaishnava sacrifice.
english translation