Verse 4

فَمَن لَّمْ يَجِدْ فَصِيَامُ شَهْرَيْنِ مُتَتَابِعَيْنِ مِن قَبْلِ أَن يَتَمَآسَّا فَمَن لَّمْ يَسْتَطِعْ فَإِطْعَامُ سِتِّينَ مِسْكِينًا ذَٰلِكَ لِتُؤْمِنُوا۟ بِٱللَّهِ وَرَسُولِهِۦ وَتِلْكَ حُدُودُ ٱللَّهِ وَلِلْكَـٰفِرِينَ عَذَابٌ أَلِيمٌ

However, those who cannot find one, they shall then fast two consecutive months before they resume their husband-wife relationship, but if those who are unable to, then they shall feed sixty poor people. This is in order to attain belief in God and His messenger. And these are God’s limits and reserved for the unfaithful is a painful suffering.