"And it is reported from [the Prophet] – Allah bless him and grant him peace – that he said: 'Every action from the son of Adam is multiplied [s: in its reward]. Every good action has the likes of ten rewards or multiplied up to seven hundred times. Allah [Mighty and Exalted is He] then said: Except for fasting. It is for me and I alone reward it. A person abandons both his desires and his food because of me…' [...] In Allah's saying – Mighty and Exalted is He 'except for fasting. It is for me and I alone reward it. A person abandons both their desires and their food because of me', there is an ascription made to Himself that is an ascription of ennoblement (idafat tashrif) and no ostentation (riya') enters into it because it is in secret and because hunger and thirst is not a means of drawing near to any king on this earth nor any idol. And Allah saying, 'I alone reward it' is the case only if the person remains constant in all acts of worship. Its meaning is: it has immense reward because Allah alone is the one who grants that favour [...] and [Allah] saying, 'a person abandons both his desires and his food because of me' means: when a person prefers obeying [s: and worshipping] Allah over and above obeying his own desires, even when the desires are so strong and one's whims are overpowering, Allah will reward that person by granting it Himself. So, whoever prefers Allah, Allah prefers him and Allah is with His servants as He is with Himself. Therefore, whoever desires to commit acts of disobedience but then abandons it out of fear of Allah, Allah then commands the angel: 'write down a reward for him because he abandoned the agitations of his desire for my sake', i.e. because of me…"
Ustadh ibn Kemaludeen al-Hanafi