In the name of Allah, the Gracious, the Merciful
Abu Huraira, RadhiAllahu Anhu, reported: The Messenger of Allah, SallAllahu Alayhi Wa Sallam, said:
مَنْ لَمْ يَدَعْ قَوْلَ الزُّورِ وَالْعَمَلَ بِهِ فَلَيْسَ لِلَّهِ حَاجَةٌ فِي أَنْ يَدَعَ طَعَامَهُ وَشَرَابَهُ
Whoever does not leave evil words and deeds while fasting, Allah does not need him to leave food and drink.
Source: Ṣaḥīḥ al-Bukhārī 1804, Grade: Sahih
Abu Huraira, RadhiAllahu Anhu, reported: The Messenger of Allah, SallAllahu Alayhi Wa Sallam, said:
إِنَّ الصِّيَامَ لَيْسَ مِنَ الأَكْلِ وَالشُّرْبِ فَقَطْ إِنَّمَا الصِّيَامُ مِنَ اللَّغُوِ وَالرَّفَثِ فَإِنْ سَابَّكَ أَحَدٌ أَوْ جَهِلَ عَلَيْكَ فَقُلْ إِنِّي صَائِمٌ
Verily, fasting is not only from eating and drinking. Rather, fasting is from vanity and obscenity. If someone abuses you or acts foolish against you, then say: Indeed, I am fasting.
Source: Ṣaḥīḥ Ibn Ḥibbān 3561, Grade: Sahih
In another narration, the Prophet (SallAllahu Alayhi Wa Sallam) said:
لَا تُسَابَّ وَأَنْتَ صَائِمٌ فَإِنْ سَابَّكَ أَحَدٌ فَقُلْ إِنِّي صَائِمٌ وَإِنْ كُنْتَ قَائِمًا فَاجْلِسْ
Do not insult anyone while you are fasting. If anyone insults you, then say: Indeed, I am fasting. If you are standing, then sit down.
Source: Ṣaḥīḥ Ibn Khuzaymah 1994, Grade: Sahih
Abu Huraira, RadhiAllahu Anhu, reported: The Messenger of Allah, SallAllahu Alayhi Wa Sallam, said:
رُبَّ صَائِمٍ لَيْسَ لَهُ مِنْ صِيَامِهِ إِلَّا الْجُوعُ وَرُبَّ قَائِمٍ لَيْسَ لَهُ مِنْ قِيَامِهِ إِلَّا السَّهَرُ
One might fast and he gets nothing from his fast but hunger. One might pray at night but he gets nothing from his prayer but fatigue.
Source: Sunan Ibn Mājah 1690, Grade: Sahih
Ibn Umar, RadhiAllahu Anhuma, reported: The Messenger of Allah, SallAllahu Alayhi Wa Sallam, said:
رُبَّ صَائِمٍ حَظُّهُ مِنْ صِيَامِهِ الْجُوعُ وَالْعَطَشُ وَرُبَّ قَائِمٍ حَظُّهُ مِنْ قِيَامِهِ السَّهَرُ
One who fasts might only acquire hunger and thirst from his fasting. One who stands for prayer might only acquire fatigue from his prayer.
Source: al-Mu’jam al-Kabīr 13412, Grade: Sahih
Success comes from Allah, and Allah knows best.