Skandapurana 6.3.180.56

6.3.180.56

yudhiṣṭhira uvāca -
sarasvatī mahāpuṇyā nadīnāmuttamā nadī .
śrīmārkaṇḍeya uvāca -
rājannāśvayuje māsi daśamyāṃ tadviśiṣyate .
pārthiveṣu ca tīrthe tu sarveṣveva na saṃśayaḥ .. 180.56 ..

Yudhiṣṭhira said:
“Sarasvatī is greatly sacred, the best river of rivers.”
Glorious Mārkaṇḍeya said:
“O king, on the tenth day in the month of Āśvayuja, that is distinguished
among all earthly sacred fords, without doubt.