Matsya Purana — Glory of Tīrtha-Śrāddha: Best Times
दानमेतेषु सर्वेषु दत्तं कोटिशताधिकम् बाहुदा च नदीपुण्या तथा सिद्धवनं शुभम् //
dānameteṣu sarveṣu dattaṃ koṭiśatādhikam bāhudā ca nadīpuṇyā tathā siddhavanaṃ śubham //
Among all these sacred contexts, a gift (dāna) that is given yields merit exceeding hundreds of koṭis. Moreover, the Bāhudā—an auspicious, purifying river—is praised, and likewise the holy Siddhavana, a blessed (śubha) sacred grove.
This verse does not address Pralaya; it focuses on the extraordinary merit (puṇya) of charitable giving connected with sacred contexts and holy places.
It reinforces dāna as a core dharma: householders and rulers are encouraged to give generously—especially in sanctified settings—because such giving is said to multiply merit immensely.
The ritual significance is tirtha-centered: the verse highlights sacred geography (a holy river and a holy grove/site), implying that offerings and gifts performed at such places are ritually amplified in merit.