JSBhom 8:155 :ܪܲܒ݂ܛܵܗ݀ ܠܥܵܢ̈ܵܐ ܕܬܸܕ݂ܚܽܘܩ ܢܲܦ݂ܫܵܗ݀ ܡܸܢ ܡܲܒ݁ܽܘܥܵܐ܃ ܕܢܸܦܪܽܘܫ ܢܸܦܽܘܩ ܐܸܡܪܵܐ ܕܕܸܒ݂ܚܵܐ ܡܸܢ ܡܲܪܥܝܼܬ݂ܵܐ‏ : it repelled the sheep to push itself away from the source so the the sacrificial lamb would emerge separately from the flock
See the entire entry for rbṭ vb. to repel