See the entire entry for bˀš vb. to be bad, to be displeasing

P Ex5:23 :ܡܢ ܫܥܬܐ ܕܐܬܿܝܬ ܠܘܬ ܦܪܥܘ : from the moment when I came to Pharaoh

See the entire entry for šāˁā, šāˁtā n.f. moment of time; hour