The Compendium of Caraka 2.4.54

2.4.54

daśa śleṣmakṛtā yasmāt pramehāḥ ṣaṭ ca pittajāḥ/
yathā ca vāyuścaturaḥ pramehān kurute balī//

the reason why ten pramehas are caused by phlegm and six born of pitta,
and how powerful vāta produces four pramehas;