Astanga Hrudaya
त्वचं तिल्वकमूलस्य त्यक्त्वाऽऽभ्यन्तरवल्कलम् । विशोष्य चूर्णयित्वा च द्वौ भागौ गालयेत् ततः ॥ ३८ ॥
The outer bark of the root of tilvaka (Symplocos racemosa) is collected, discarding its innermost woody sheath. It is then dried and ground into a fine powder, which is divided into three parts; two parts of this powder are strained and processed with the decoction of lodhra (tilvaka) itself.
english translation
tvacaM tilvakamUlasya tyaktvA''bhyantaravalkalam । vizoSya cUrNayitvA ca dvau bhAgau gAlayet tataH ॥ 38 ॥
hk transliteration by Sanscript