Divrey Hayamim Bais 30:18

For most of HaAm, even many of Ephrayim, and Menasheh, Yissakhar, and Zevulun, had not made themselves tahor, yet did they eat the Pesach contrary to what was written. But Chizkiyahu (Yechizkiyahu) davened for them, saying, May HASHEM Hatov grant kapporah to