וְשַׁעֲרַ֙יִם֙ וַעֲדִיתַ֔יִם וְהַגְּדֵרָ֖ה וּגְדֵרֹתָ֑יִם עָרִ֥ים אַרְבַּֽע־עֶשְׂרֵ֖ה וְחַצְרֵיהֶֽן׃
and Shaaraim, and Adithaim, and Gederah, with Gederothaim; fourteen cities with their villages.
Rashi on Joshua
Fourteen cities. If you count them however you will find fifteen. I say [therefore] that Tapuach and Einom are one, and this its explanation: Tapuach and its spring (עַיִן). This is Ein-Tapuach that is mentioned in the inheritance of Menashe ‘To the inhabitants of Ein-Tapuach.’29See chapter 17:7.