Surah Al-Isra 17:7

إِنْ أَحْسَنتُمْ أَحْسَنتُمْ لِأَنفُسِكُمْ ۖ وَإِنْ أَسَأْتُمْ فَلَهَا ۚ فَإِذَا جَآءَ وَعْدُ ٱلْـَٔاخِرَةِ لِيَسُـۥٓـُٔوا۟ وُجُوهَكُمْ وَلِيَدْخُلُوا۟ ٱلْمَسْجِدَ كَمَا دَخَلُوهُ أَوَّلَ مَرَّةٍ وَلِيُتَبِّرُوا۟ مَا عَلَوْا۟ تَتْبِيرًا

[And said], "If you do good, you do good for yourselves; and if you do evil, [you do it] to them [i.e., yourselves]." Then when the final [i.e., second] promise came, [We sent your enemies] to sadden your faces and to enter the masjid [i.e., the temple in Jerusalem], as they entered it the first time, and to destroy what they had taken over with [total] destruction.

Translation: Saheeh International

Tafsir

And We said ‘If you are virtuous through acts of obedience you are being virtuous to your own souls since the reward thereof is for them your souls; and if you do evil by way of working corruption it is for them’ your evildoing. …

Excerpt from Tafsir al-Jalalayn, commentary on 17:7, via Quran.com. The reader has the full commentary and 9 more tafsirs.