GregOr 13 6.2.6 :ܐܝ̈ܕܝܐ ܕܟܗ̈ܢܐ ܕܡܬܬܪ̈ܝܡܢ ܥܠ ܛܘܪܐ܃ ܘܡܬܛܦ̈ܣܢ ܠܨܠܘܬܐ‏ : the priests' hands that were lifted up on the mountain and committed to prayer
See the entire entry for pys vb. D to appease, to reconcile