Matsyapurana 104.18

104.18

tato gatvā prayāgaṃ tu sarvadevābhirakṣitam
brahmacārī vasenmāsaṃ pitṝndevāṃśca tarpayet
īpsitāṃllabhate kāmān yatra yatrābhijāyate //

Those who maintain their sexual purity for a month in that sacred place, protected by the Devas, and offer libations of water to the manes of the deceased ancestors and to the Gods, always attain what they desire, wherever they are born.—17.