Salamah bin Al Akwa said “After the revelation of the verse “For those who can do it(with hardship) is a ransom, the feeding of one, that is indigent, is one of us intended to leave fast and pay ransom, he could do so.” until the verse following it was revealed and abrogated the (previous) verse.” (Using translation from Abū Dāʾūd 2315)  

لَمَّا نَزَلَتْ هَذِهِ الْآيَةُ {وَعَلَى الَّذِينَ يُطِيقُونَهُ فِدْيَةٌ طَعَامُ مِسْكِينٍ} [البقرة 184] كَانَ مَنْ أَرَادَ مِنَّا أَنْ يُفْطِرَ وَيَفْتَدِيَ حَتَّى نَزَلَتِ الْآيَةُ الَّتِي بَعْدَهَا فَنَسَخَتْهَا  

[Machine] In His saying ﷻ "And upon those who are able [to fast, but with hardship] is a ransom [as substitute] of feeding a poor person [each day]" [Surah Al-Baqarah 2:184], it is said: "those who are able [to fast, but with hardship] are required to give a ransom of feeding a poor person, and whoever voluntarily offers more food to another poor person, it is not considered abrogated. It is better for him, and it is better for you to fast. It is not permissible to be exempted from fasting in this except for the elderly who are unable to fast or for a sick person who is not able to recover.  

فِي قَوْلِهِ ﷻ {§وَعَلَى الَّذِينَ يُطِيقُونَهُ فِدْيَةٌ طَعَامُ مِسْكِينٍ} [البقرة 184] قَالَ يُطِيقُونَهُ يُكَلَّفُونَهُ فِدْيَةٌ طَعَامُ مِسْكِينٍ وَاحِدٍ فَمَنْ تَطَوَّعَ فَزَادَ طَعَامَ مِسْكِينٍ آخِرَ لَيْسَتْ بِمَنْسُوخَةٍ فَهُوَ خَيْرٌ لَهُ وَأَنْ تَصُومُوا خَيْرٌ لَكُمْ لَا يُرَخَّصُ فِي هَذَا إِلَّا لِلْكَبِيرِ الَّذِي لَا يُطِيقُ الصِّيَامَ أَوْ مَرِيضٍ لَا يُشْفَى