The Compendium of Caraka 6.3.121

6.3.121

svayaṃ śrutvā 'anumānena &lakṣyate praśamena vā/
vaividhyādabhicārasya śāpasya ca tadātmake//
&`lakṣayet' iti pā-.
yathākarmaprayogeṇa lakṣaṇaṃ syāt pṛthagvidham/
dhyānaniḥśvāsabahulaṃ liṅgaṃ kāmajvare smṛtam//

or having heard it oneself, or by inference or relief, it is recognized. / Because of the variety of sorcery and curses, in that which is caused by them, / according to the application of the rite, the characteristics are of various kinds. / Frequent brooding and deep sighs are remembered as the sign in fever from passion;