Ziyad bin Abi Maryam, may Allah have mercy on him, said regarding the statement of Allah the Exalted «وَعَلَى الَّذِينَ يُطِيقُونَهُ» : That is, those people who have reached the age of performing deeds (worship), then fasting is obligatory upon them. So whoever among them is unable to fast due to any illness, cold, or any other excuse, or is very old, then it is obligatory upon him to feed one needy person as compensation for each day. ﴿فَمَنْ تَطَوَّعَ خَيْرًا﴾ That is, if someone feeds two needy people for each day, it is better, ﴿وَأَنْ تَصُومُوا خَيْرٌ لَكُمْ﴾ That is, fasting is better than this.