Sura al-Tawbah 9:91

لَّيْسَ عَلَى ٱلضُّعَفَآءِ وَلَا عَلَى ٱلْمَرْضَىٰ وَلَا عَلَى ٱلَّذِينَ لَا يَجِدُونَ مَا يُنفِقُونَ حَرَجٌ إِذَا نَصَحُوا۟ لِلَّـهِ وَرَسُولِهِۦ مَا عَلَى ٱلْمُحْسِنِينَ مِن سَبِيلٍ وَٱللَّـهُ غَفُورٌ رَّحِيمٌ

laysa ʿalā l-ḍuʿafāʾi wa-lā ʿalā l-marḍā wa-lā ʿalā lladhīna lā yajidūna mā yunfiqūna ḥarajun idhā naṣaḥū lillāhi wa-rasūlihi mā ʿalā l-muḥsinīna min sabīlin wallāhu ghafūrun raḥīmun

There is no blame on those who are infirm, or ill, or who find no resources to spend (on the cause), if they are sincere (in duty) to Allah and His Messenger: no ground (of complaint) can there be against such as do right: and Allah is Oft-forgiving, Most Merciful.