Ps-Clem Recogs 1.20:22 :ܐܝܟ ܚܝܠܗ ܕܗܘ ܕܬܒܥ ܠܗܘܢ ܗܢܘܢ ܟܕ ܗܢܘܢ ܫܪܝܪܐ ܐܘ ܕܓܠܐ̈ ܡܣܬܒܪܝܢ‏ : those very things are considered truth or lies according to the strength of the one advocating them
See the entire entry for tbˁ vb. to seek, demand