כָּל־הֶעָרִ֗ים אֲשֶׁ֤ר תִּתְּנוּ֙ לַלְוִיִּ֔ם אַרְבָּעִ֥ים וּשְׁמֹנֶ֖ה עִ֑יר אֶתְהֶ֖ן וְאֶת־מִגְרְשֵׁיהֶֽן׃
你們分給利未人的城共有四十八座，連同城的郊野一併分給他們。
Avodah Zarah
“Forty-eight cities” (Numbers 35:7). If, on the other hand, the scribe is uncertain as to his number, let him ask the Tanna how many he counts and deduct therefrom forty-eight and he will find his solution. As a mnemonic, take the phrase, “The Scribe is sparing, the Tanna is redundant.”