Skandapurana 2.7.0.p4

2.7.0.p4

adhyāyaḥ 4 vaiśākhavratināṃ varjyapadārthāḥ, gṛhasnāne duṣṭaphūlam, vratākaraṇe doṣaḥ, nadīsaptagaṃgādevakhātavāpīṣu snānaṃ dānaṃ ca, madhusūdanaprāthanārghyadānapūjanādikam.

Chapter 4: Items to be avoided by those observing the Vaiśākha vow; the evil result of bathing at home; the fault in not performing vows; ritual ablution and gift-giving in rivers, the seven Gaṅgās, divine waters, and stepwells; prayer, offering of water (arghya), and worship to Madhusūdana.