וַיִּשְׁמַ֣ע אַבְרָ֔ם כִּ֥י נִשְׁבָּ֖ה אָחִ֑יו וַיָּ֨רֶק אֶת־חֲנִיכָ֜יו יְלִידֵ֣י בֵית֗וֹ שְׁמֹנָ֤ה עָשָׂר֙ וּשְׁלֹ֣שׁ מֵא֔וֹת וַיִּרְדֹּ֖ף עַד־דָּֽן׃
And when Abram heard that his brother was taken captive, he led forth his trained men, born in his house, three hundred and eighteen, and pursued as far as Dan.
Read kabbalistic (mystical) interpretation of Genesis 14:14: and classical mystical sources.