OS LkCur9:29 :ܘܟܕ ܡܨܠܐ ܐܫܬܚܠܦ ܚܙܘܐ ܕܐ̈ܦܘܗܝ‏ : while praying, the appearance of his face changed
See the entire entry for šḥlp vb. to change