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रसायनानां द्विविधं प्रयोगमृषयो विदुः । कुटीप्रावेशिकं चैव वातातपिकमेव च ॥ १६ ॥
कुटीप्रावेशिकस्यादौ विधिः समुपदेक्ष्यते । नृपवैद्य द्विजातीनां साधूनां पुण्यकर्मणाम् ॥ १७ ॥
निवासे निर्भये रास्ते प्राप्योपकरणे पुरे । दिशि पूर्वोत्तरस्यां च सुभूमौ कारयेत् कुटीम् ॥ १८ ॥
विस्तारोत्सेधसंपन्न त्रिगर्भो सुक्ष्मलोचनाम् । घनमित्तिमृतसुखां सुस्पष्टां मनसः प्रियाम् ॥ १९ ॥
शब्दादीनामशस्तानामगम्यां स्त्रीविवर्जिताम् । इष्टोपकरणोपेतां सज्जवैद्यौषधद्विजाम् ॥ २० ॥
अथोदगयने शुक्ले तिथिनक्षत्रपूजिते । मुहुर्तकरणोपेते प्रशस्ते कृतवापनः ॥ २१ ॥
धृतिस्मृतिबलं कृत्वा श्रद्दधानः समाहितः । विधूय मानसान् दोषान् मैत्रीं भूतेषु चिन्तयन् ॥ २२ ॥
देवताः पूजयित्वाऽग्रे द्विजातश्चि प्रदक्षिणम् । देवयोब्राह्मणान् कृत्वा ततस्तां प्रविशेत् कुटीम् ॥ २३ ॥
तस्यां संशोधनैः शुद्धः सुखी जातबलः पुनः । रसायनं प्रयुञ्जीत तत्प्रवक्ष्यामि शोधनम् ॥ २४ ॥

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{"source": "Samhita : Charaka Samhita Part 2, Chapter :1, Sthanam :Chikitsasthanam, Shloka Number: 16 to 24", "explanation": "These verses (16-24) describe the two main methods of Rasayana administration: Kutipraveshika (indoor) and Vatatapika (outdoor), focusing primarily on the Kutipraveshika method.  It details the ideal setting, cottage construction, and preparatory practices for the individual undergoing the treatment.\n\n**Verse 16:** Introduces the two methods of Rasayana administration.\n\n**Verse 17:**  Begins the explanation of the Kutipraveshika method, specifying the ideal environment for the cottage.\n\n**Verse 18:** Details the location and direction the cottage should face (East or North) in a safe and accessible area with necessary resources.\n\n**Verse 19:** Describes the cottage's physical attributes: spacious, with good height, three chambers, a small opening, thick walls, comfortable, clean, and aesthetically pleasing.\n\n**Verse 20:**  Specifies that the cottage should be free from distractions (noise, etc.), women, and equipped with necessary supplies, a physician, medicines, and Brahmanas.\n\n**Verse 21:** Outlines the auspicious timing for entering the cottage: Uttarayana (northern course of the sun), Shukla Paksha (bright fortnight), auspicious date, star, Muhurta, and Karana. The individual should also have a clean shave.\n\n**Verse 22:** Describes the individual's mental preparation: strong determination, memory, faith, concentration, freedom from mental disturbances, and cultivating a sense of universal compassion.\n\n**Verse 23:**  Details the ritualistic entry into the cottage: worshiping deities and Brahmanas, circumambulating them (keeping them on the right side), and then entering.\n\n**Verse 24:** Emphasizes the importance of purification therapies before starting the Rasayana treatment.\n\n**Table summarizing the Kutipraveshika method:**\n\n| Aspect | Description |\n|---|---| \n| **Location** | Safe, accessible, near king, physician, Brahmanas, holy people |\n| **Direction** | East or North |\n| **Cottage Features** | Spacious, three chambers, small opening, thick walls, comfortable, clean, aesthetically pleasing |\n| **Environment** | Free from distractions, women; equipped with supplies, physician, medicines, Brahmanas |\n| **Timing** | Uttarayana, Shukla Paksha, auspicious date, star, Muhurta, Karana |\n| **Individual's Preparation** | Clean-shaven, strong determination, memory, faith, concentration, mental clarity, compassion |\n| **Entry Ritual** | Worship deities and Brahmanas, circumambulate, enter cottage |\n| **Pre-Rasayana** | Purification therapies |\n\nThis detailed approach ensures the individual is physically, mentally, and spiritually prepared for the Rasayana therapy, maximizing its effectiveness."}
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