Śrīmad-Bhāgavatam 2.6.25
Blended reading (Sanskrit + English inline)
To perform a sacrifice successfully, at least four expert priests are needed: one who can offer ( hotā ), one who can chant ( udgātā ), one who can kindle the sacrificial fire without the aid of separate fire ( adhvaryu ), and one who can supervise ( brahmā ). Such sacrifices were conducted from the birth of Brahmā, the first living creature, and were carried on till the reign of Mahārāja Yudhiṣṭhira. But such expert brāhmaṇa priests are very rare in this age of corruption and quarrel, and therefore in the present age only the yajṣa of chanting the holy name of the Lord is recommended. The scriptures enjoin:
harer nāma harer nāma harer nāmaiva kevalam kalau nāsty eva nāsty eva nāsty eva gatir anyathā
This sentence continues for four verses. In order to make ingredients (teṣu) for sacrifice, I produced the ingredients from the Lord’s limbs (saṁbharāḥ sambhṛtāḥ). The end of the sentence is in verse 28. Vanaspatayaḥ means sacrificial posts. Deva-yajanam is a sacrificial ground, for it is said that one should sit in a place worthy of sacrifice. Bahu-guṇānvitaḥ means times like spring. Vastūni means plates and other utensils. Oṣadhayaḥ means plants like rice. Snehā means oils like ghee. Rasa means liquids like honey. Loha means metals like gold. Cātur-hotram means acts like offering oblations.
Nāmadheyāni means the names of the sacrifices such as jyotiṣṭoma. Devatānukrama means assigning the locations of the devatās. Kalpa means a practical guide to the actions such as Baudhāyana-śrauta-sūtras. Saṁkalpa means the utterance of a ritual vow, such as “Now I perform this ceremony.” Tantram means the method of performance.
My note
Source: vedabase.io