Charak Samhita
अथौपम्यम्- औपम्यंनामयदन्येनान्यस्यसादृश्यमधिकृत्यप्रकाशनं; यथा- दण्डेनदण्डकस्य, धनुषाधनुःस्तम्भस्य, इष्वासेनाऽऽरोग्यदस्येति ॥४२॥
॥ 21.Aupamya (analogy)॥ Aupamya is the description of similarity between things such as analogy of dandaka (a disease in which body is rigid like rod) with danda (rod); that of dhanustambha (tetany) with bow and that of the health provider with the archer.
english translation
athaupamyam- aupamyaMnAmayadanyenAnyasyasAdRzyamadhikRtyaprakAzanaM; yathA- daNDenadaNDakasya, dhanuSAdhanuHstambhasya, iSvAsenA''rogyadasyeti ॥42॥
hk transliteration by Sanscript