וַיִּקַּ֨ח שְׁמוּאֵ֜ל אֶ֣בֶן אַחַ֗ת וַיָּ֤שֶׂם בֵּֽין־הַמִּצְפָּה֙ וּבֵ֣ין הַשֵּׁ֔ן וַיִּקְרָ֥א אֶת־שְׁמָ֖הּ אֶ֣בֶן הָעָ֑זֶר וַיֹּאמַ֕ר עַד־הֵ֖נָּה עֲזָרָ֥נוּ יְהוָֽה׃
撒母耳取了一塊石頭，立在米斯巴和善的中間，給它起名叫以便以謝，說：「永恆者幫助我們直到這裡。」
Rashi
Even Haezer [Lit. the rock of help]. This was not yet its name,2 Obviously, because they were soundly defeated now. for it was first called this name [later] in Shmuel's time, but here Scripture calls it by its future name.