Khums

Assalamu aleykum,
I need to know and understand the law about Khums. Can you please give me a proof or hawala of any Hadith or aayat which says the word ghanimat includes salary or not?
Jazak Allah.
 

بِسْمِ اللهِ الرَّحْمٰنِ الرَّحِيْمِ
الجواب وباللہ التوفیق
For this you should read Surah Anfal verse no. 41 and Tafsir Maarif-ul-Quran or Tafsir Mazhari, below this verse.

Fatawa ID: 1481

فقط واللہ اعلم بالصواب