تِلۡكَ أُمَّةٞ قَدۡ خَلَتۡۖ لَهَا مَا كَسَبَتۡ وَلَكُم مَّا كَسَبۡتُمۡۖ وَلَا تُسۡـَٔلُونَ عَمَّا كَانُواْ يَعۡمَلُونَ ١٣٤
That was a nation which has passed on. It will have [the consequence of] what it earned, and you will have what you have earned. And you will not be asked about what they used to do.
Translation: Saheeh International (English)
Each word's meaning and sound
That nation has passed away like other communities. They gained whatever they did in their lives, earning either good or evil; and you will gain what you have earned. You will not be asked about what they did, and they will not be asked about what you do. No one is held to account for the disobedience of another, but everyone is rewarded according to their own actions. You should not be distracted from paying attention to your own behaviour by looking at what those before you did. Nothing will benefit anyone except his own good actions.
Al-Mukhtasar in interpreting the Noble Quran