<p>In the 8<sup>th</sup> century BC the Israelites were expelled from northern Israel by the Assyrians, according to historians, some to Media (Armenia). Later, in the 6<sup>th</sup> century BC, the southern tribe of Israel, Judah (&ldquo;Jews&rdquo;) was expelled by the Babylonians, later many of them migrated to the regions of the Caucasus. There are numerous references to the stay of Jews in the Caucasus in scientific and popular science literature, which makes us expect that evidence of these connections could and should have been preserved in the Caucasian languages. However, the problem of searching for Hebraisms and lexical evidence of the influence of one language on another is complicated by the fact that from the 7<sup>th</sup> century, Arabic penetrated into the Caucasian languages along with religion, and since Arabic and Hebrew are related languages, it becomes more difficult to establish from which language (Hebrew or Arabic) the term penetrates into Caucasian languages. This study is devoted to the analysis of Arabic and Hebrew uses in the Caucasian languages. The comparative-historical and etymological research methods used in the work will help, in our opinion, to determine the source of some lexical units in the Dagestan languages that are part of the Iberian-Caucasian family of languages.</p>