MuU 1.2.3
यस्याग्निहोत्रमदर्शमपौर्णमास- मचातुर्मास्यमनाग्रयणमतिथिवर्जितं च । अहुतमवैश्वदेवमविधिना हुत- मासप्तमांस्तस्य लोकान् हिनस्ति
yasyāgnihotramadarśamapaurṇamāsa- macāturmāsyamanāgrayaṇamatithivarjitaṃ ca | ahutamavaiśvadevamavidhinā huta- māsaptamāṃstasya lokān hinasti
Sanskrit for this text is pending; the English follows the translator's numbering.
If a man's Agnihotra sacrifice is not followed by the new-moon and full-moon sacrifices, by the four-months' sacrifices, and by the harvest sacrifice, if it is unattended by guests, not offered at all, or without the Vaisvadeva ceremony, or not offered according to rule, then it destroys his seven worlds.
Translated by F. Max Müller