Surah Al-Mujadilah, ayah 4

فَمَن لَّمۡ يَجِدۡ فَصِيَامُ شَهۡرَيۡنِ مُتَتَابِعَيۡنِ مِن قَبۡلِ أَن يَتَمَآسَّاۖ فَمَن لَّمۡ يَسۡتَطِعۡ فَإِطۡعَامُ سِتِّينَ مِسۡكِينٗاۚ ذَٰلِكَ لِتُؤۡمِنُواْ بِٱللَّهِ وَرَسُولِهِۦۚ وَتِلۡكَ حُدُودُ ٱللَّهِۗ وَلِلۡكَٰفِرِينَ عَذَابٌ أَلِيمٌ ٤

Famal lam yajid fasiyāmu shahrayni mutatābi'ayni min qabli an yatamāssā famal lam yastati' fa it'āmu sittīna miskīnan dhālika litu'minū billāhi warasūlihī watilka hudūdullāhi walil-kāfirīna 'adhābun alīm

And he who does not find [a slave] - then a fast for two months consecutively¹⁶⁴⁰ before they touch one another; and he who is unable - then the feeding of sixty poor persons. That is for you to believe [completely] in Allāh and His Messenger; and those are the limits [set by] Allāh. And for the disbelievers is a painful punishment.