Garudapurana 1.59.35

1.59.35

etā dagdhā na gantavyaṃ pīḍādiḥ kila mānavaiḥ /
viśākhātrayamāditye pūrvāṣāḍhātraye śaśī //

these are 'burnt' [tithis]; men must not travel during them, for they bring suffering. / The triad beginning with Viśākhā on Sunday; the triad beginning with Pūrvāṣāḍhā on Monday;