• أَنفَال
• نَافِلَة

Appears 3 times in the Quran.

1. 8:1 يَسْـَٔلُونَكَ عَنِ ٱلْأَنفَالِ قُلِ ٱلْأَنفَالُ لِلَّهِ وَٱلرَّسُولِ فَٱتَّقُوا۟ ٱللَّهَ وَأَصْلِحُوا۟ ذَاتَ بَيْنِكُمْ وَأَطِيعُوا۟ ٱللَّهَ وَرَسُولَهُۥٓ إِن كُنتُم مُّؤْمِنِينَ

   They ask you about the windfalls. Say: The windfalls are for Allah and the Messenger. So be careful of (your duty to) Allah and set aright matters of your difference, and obey Allah and His Messenger if you are believers.
   

2. 17:79 وَمِنَ ٱلَّيْلِ فَتَهَجَّدْ بِهِۦ نَافِلَةً لَّكَ عَسَىٰٓ أَن يَبْعَثَكَ رَبُّكَ مَقَامًا مَّحْمُودًا

   And during a part of the night, pray Tahajjud beyond what is incumbent on you; maybe your Lord will raise you to a position of great glory.
   

3. 21:72 وَوَهَبْنَا لَهُۥٓ إِسْحَٰقَ وَيَعْقُوبَ نَافِلَةً وَكُلًّا جَعَلْنَا صَٰلِحِينَ

   And We gave him Ishaq and Yaqoub, a son's son, and We made (them) all good.