בְּבֹאָ֞ם אֶל־אֹ֣הֶל מוֹעֵ֗ד וּבְקָרְבָתָ֛ם אֶל־הַמִּזְבֵּ֖חַ יִרְחָ֑צוּ כַּאֲשֶׁ֛ר צִוָּ֥ה יְהוָ֖ה אֶת־מֹשֶֽׁה׃ (ס)
Kapag sila ay pumapasok sa Tolda ng Pagtitipan, at kapag sila ay lumalapit sa altar, sila ay naghuhugas; gaya ng iniutos ng Walang-Hanggan kay Moises.
Rashi
ובקרבתם — This is equivalent to ובקרבם, and has an imperfect sense, the same as כשיקרבו. when they were approaching.