JSmem 4:73 : ܡܢ ܫܘܪܝܐ ‍<‍ܐܬܚ݁ܝ݂ܕ‍>‍ ܠܗ ܓܢܣܢܐܝܬ‏ : from the beginning he was joined to him in a familial way
See the entire entry for gensānāˀīṯ adv. in the genitive case