IshDeut 122:4 :ܚܡܝܥܐ݂ ܟܠܗ݀ ܓܒܝܠܬܐ ܕܠܝܫܐ ܕܐܝܬ ܒܗ݀ ܚܡܝܪܐ‏ : ḥ' is any lump of dough with yeast in it
See the entire entry for ḥammīˁ, ḥammīˁā n.m. leaven