Astanga Hrudaya
एकैकः प्रसृतो वस्तिः कृष्णाकल्को वृषत्वकृत् ।
Infuse this rich mixture with a fine medicinal paste of kṛṣṇā (Pippalī / Piper longum) to administer as an enema. This preparation serves as an exceptional aphrodisiac, building up sexual vigor, vitality, and fertility (vṛṣatva-kṛt). Following the various prasṛta enema recipes, I shall now describe the proven, highly successful enemas (siddha-vastīn) that can be safely administered at any time and under all conditions (sarvadā yān prayojayet).
english translation
ekaikaH prasRto vastiH kRSNAkalko vRSatvakRt ।
hk transliteration by Sanscript