Surah At-Tawbah, Verse 44

لَا يَسۡتَـٔۡذِنُكَ ٱلَّذِينَ يُؤۡمِنُونَ بِٱللَّهِ وَٱلۡيَوۡمِ ٱلۡأٓخِرِ أَن يُجَٰهِدُواْ بِأَمۡوَٰلِهِمۡ وَأَنفُسِهِمۡۗ وَٱللَّهُ عَلِيمُۢ بِٱلۡمُتَّقِينَ٤٤

lā yastadhinuka alladhīna yu'minūna bil-lahi wal-yawmi l-ākhiri an yujāhidū bi-amwālihim wa-anfusihim wal-lahu ʿalīmun bil-mutaqīna

Those who believe in Allāh and the Last Day would not ask permission of you to be excused from striving [i.e., fighting] with their wealth and their lives. And Allāh is Knowing of those who fear Him.