וַיִּֽחַר־אַ֤ף יְהוָה֙ בְּיִשְׂרָאֵ֔ל וַֽיִּמְכְּרֵ֗ם בְּיַד֙ כּוּשַׁ֣ן רִשְׁעָתַ֔יִם מֶ֖לֶךְ אֲרַ֣ם נַהֲרָ֑יִם וַיַּעַבְד֧וּ בְנֵֽי־יִשְׂרָאֵ֛ל אֶת־כּוּשַׁ֥ן רִשְׁעָתַ֖יִם שְׁמֹנֶ֥ה שָׁנִֽים׃
Therefore the anger of the LORD was kindled against Israel, and He gave them over into the hand of Cushan-rishathaim king of Aram-naharaim; and the children of Israel served Cushan-rishathaim eight years.
Read kabbalistic (mystical) interpretation of Judges 3:8: and classical mystical sources.