MUṆḌAKA UPANISHAD · 1.2.3

यस्याग्निहोत्रमदर्शमपौर्णमासमचातुर्मास्यमनाग्रयणमतिथिवर्जितं च ।
अहुतमवैश्वदेवमविधिना हुतमासप्तमांस्तस्य लोकान् हिनस्ति ॥ ३॥

yasyāgnihotramadarśamapaurṇamāsamacāturmāsyamanāgrayaṇamatithivarjitaṃ ca ।
ahutamavaiśvadevamavidhinā hutamāsaptamāṃstasya lokān hinasti ॥ 3॥

For he whose altar-fires are empty of the new-moon offering and the full-moon offering and the offering of the rains and the offering of the first fruits, or unfed, or fed without right ritual, or without guests or without the dues to the Vishwa-Devas, destroys his hope of all the seven worlds.

Sri Aurobindo · CWSA 18, p. 133