Matsya Purana — The Legend of Acchodā: Pitṛloka
अच्छोदं नाम च सरः पितृभिर्निर्मितं पुरा अच्छोदा तु तपश्चक्रे दिव्यं वर्षसहस्रकम् //
acchodaṃ nāma ca saraḥ pitṛbhirnirmitaṃ purā acchodā tu tapaścakre divyaṃ varṣasahasrakam //
There is a lake named Acchoda, fashioned long ago by the Pitṛs, the ancestral Fathers. And Acchodā performed austerities for a thousand divine years.
This verse does not describe Pralaya; it highlights sacred geography—how a tirtha (Acchoda lake) is said to be created by the Pitṛs and sanctified through prolonged tapas.
By foregrounding the Pitṛs and a tirtha linked to them, the verse aligns with the householder’s duty of pitṛ-kārya (ancestral rites) and honoring sacred places associated with ancestral merit.
Ritually, the key significance is Pitṛ-association: a lake ‘made by the Pitṛs’ functions as a potent tirtha for śrāddha and ancestral offerings; no explicit Vāstu/temple-building rule is stated in this verse.