One-fifth of Booty to the Cause of Allah (Khumus)
57/7. Chapter:
The Statement of Allah تعالى: "Verily one-fifth (1/5th) of it is assigned to Allah and to the Messenger ﷺ ..." (V.8:41)
Sahih Bukhari
حَدَّثَنَا حِبَّانُ، أَخْبَرَنَا عَبْدُ اللَّهِ، عَنْ يُونُسَ، عَنِ الزُّهْرِيِّ، عَنْ حُمَيْدِ بْنِ عَبْدِ الرَّحْمَنِ، أَنَّهُ سَمِعَ مُعَاوِيَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ يُرِدِ اللَّهُ بِهِ خَيْرًا يُفَقِّهْهُ فِي الدِّينِ، وَاللَّهُ الْمُعْطِي وَأَنَا الْقَاسِمُ، وَلاَ تَزَالُ هَذِهِ الأُمَّةُ ظَاهِرِينَ عَلَى مَنْ خَالَفَهُمْ حَتَّى يَأْتِيَ أَمْرُ اللَّهِ وَهُمْ ظَاهِرُونَ ".
Narrated Muawiya: Allah's Messenger (ﷺ) said, "If Allah wants to do good for somebody, he makes him comprehend the Religion (i.e. Islam), and Allah is the Giver and I am Al-Qasim (i.e. the distributor), and this (Muslim) nation will remain victorious over their opponents, till Allah's Order comes and they will still be victorious."
Reference : Sahih al-Bukhari 3116In-book reference : Book 57, Hadith 25USC-MSA web (English) reference : Vol. 4, Book 53, Hadith 346