כַּפֵּר֩ לְעַמְּךָ֨ יִשְׂרָאֵ֤ל אֲשֶׁר־פָּדִ֙יתָ֙ יְהוָ֔ה וְאַל־תִּתֵּן֙ דָּ֣ם נָקִ֔י בְּקֶ֖רֶב עַמְּךָ֣ יִשְׂרָאֵ֑ל וְנִכַּפֵּ֥ר לָהֶ֖ם הַדָּֽם׃
“Patawarin Mo, Walang-Hanggan, ang Iyong bayang Israel na Iyong tinubos, at huwag Mong ipataw ang sala ng dugong walang-sala sa gitna ng Iyong bayang Israel.” At patatawarin sila sa dugong iyon.
Rashi
ונכפר להם הדם AND THE BLOOD SHALL BE PARDONED THEM — Scripture announces to them that when they have done this (the ceremony prescribed) their sin will be forgiven (Sotah 46a).
Chizkuni
כפר לעמך ישראל, “forgive Your people Israel!” They ask forgiveness for not having provided adequate security on the roads leading to their town so that this kind of murder could not have occurred and the perpetrator escaping with impunity. (Ibn Ezra)...
Ibn Ezra
forgive your people For we were negligent, and we did not guard the dangerous highways.