JSBhom 8:91 :ܐܼܪܵܙܵܐ ܕܼܐܝܬ݂ ܗܼܘܵܐ ܒܸܝܬ݂ ܠܸܗ ܠܲܐܒ݂ܵܐ‏ : the secret that was between him and the Father
See the entire entry for bēṯ prep. between, among