The Compendium of Bheḷa 8.8.12

8.8.12

atyalpo vātha rūkṣo vā śītavīryauṣadhastathā | lavaṇasneharikto vā tanussāndro ' tha vā bhṛśam ||

or if it is too small, or dry, or composed of drugs of cold potency, / or devoid of salt and unctuous substance, or very thin or dense,