Sushruta Samhita · Chapter 6.5

athātaḥ kṛṣṇagatarogavijñānīyamadhyāyaṃ vyākhyāsyāmaḥ//

yathovāca bhagavān dhanvantariḥ//

yat savraṇaṃ śukla(śukra)mathāvraṇaṃ vā pākātyayaścāpyajakā tathaiva/
catvāra ete'bhihitā vikārāḥ kṛṣṇāśrayāḥ saṃgrahataḥ purastāt//

nimagnarūpaṃ hi bhavettu kṛṣṇe sūcyeva viddhaṃ pratibhāti yadvai/
srāvaṃ sraveduṣṇamatīva ruk ca tat savraṇaṃ śukra(śukla)mudāharanti//

dṛṣṭeḥ samīpe na bhavettu yacca na cāvagāḍhaṃ na ca saṃsraveddhi/
avedanāvanna ca yugmaśukraṃ tatsiddhimāpnoti kadācideva//

vicchinnamadhyaṃ piśitāvṛtaṃ vā calaṃ sirāsaktamadṛṣṭikṛcca/
dvitvaggataṃ lohitamantataśca cirotthitaṃ cāpi vivarjanīyam//

uṣṇāśrupātaḥ piḍakā ca kṛṣṇe yasmin bhavenmudganibhaṃ ca śukram/
tadapyasādhyaṃ pravadanti kecidanyacca yattittiripakṣatulyam//

sitaṃ yadā bhātyasitapradeśe syandātmakaṃ nātirugaśruyuktam/
vihāyasīvācchaghanānukāri tadavraṇaṃ sādhyatamaṃ vadanti//

gambhīrajātaṃ bahalaṃ ca śukraṃ cirotthitaṃ cāpi vadanti kṛcchram/
saṃcchādyate śvetanibhena sarvaṃ doṣeṇa yasyāsitamaṇḍalaṃ tu//

tamakṣipākātyayamakṣikopasamutthitaṃ tīvrarujaṃ vadanti/
ajāpurīṣapratimo rujāvān salohito lohitapicchilāśruḥ/
vidārya kṛṣṇaṃ pracayo'bhyupaiti taṃ cājakājātamiti vyavasyet//