וְאִם־לֹ֤א תִשְׁמְעוּ֙ בְּק֣וֹל יְהוָ֔ה וּמְרִיתֶ֖ם אֶת־פִּ֣י יְהוָ֑ה וְהָיְתָ֧ה יַד־יְהוָ֛ה בָּכֶ֖ם וּבַאֲבֹתֵיכֶֽם׃
Ngunit kung hindi kayo makikinig sa tinig ng Walang-Hanggan, at maghihimagsik kayo laban sa utos ng Walang-Hanggan, ang kamay ng Walang-Hanggan ay magiging laban sa inyo, gaya ng naging laban sa inyong mga ninuno.
Tze'enah Ure'enah
“If you did not listen” [12:15]. If you will not listen to the Holy One’s commandments, God will punish you. Therefore, see now also that God does miracles for you. Is today the wheat harvest? I will call on the Holy One and He will give me rain and great thunder and lightning. It was a great wonder that rain should fall during the harvest of the wheat or grain. Therefore, Samuel said: I want to make rain fall today with my prayers. Samuel prayed and rain fell and there was great thunder. Israel feared God and Samuel.
Rashi
Then Adonoy's hand will be against you and against your forefathers. Meaning it will be against you after it was against your fathers. Our Rabbis however said, "against you and against your fathers" refers to the digging up of the dead, which is a disgrace upon the dead.9 Maseches Yevamos 63b. When people sin, the past generations are also punished by having their grave sites disturbed.—Radak