EphPar 12:11.5 :ܠܐ ܡܨܛܪܦ ܡܡܬܘܡ ܟܣܦܐ ܕܠܐ ܢܘܪܐ‏ : silver is never refined without fire
See the entire entry for ṣrp vb. to refine; to tighten