✅ Answer: Refer to the following narrations:

1⃣عَنِ الْحَلَبِیِّ عَنْ أَبِی عَبْدِ اللَّهِ أَنَّهُ سُئِلَ عَنْ رَجُلٍ تَسَحَّرَ ثُمَّ خَرَجَ مِنْ بَیْتِهِ وَ قَدْ طَلَعَ الْفَجْرُ وَ تَبَیَّنَ قَالَ یُتِمُّ صَوْمَهُ ذَلِکَ ثُمَّ لْیَقْضِهِ فَإِنْ تَسَحَّرَ فِی غَیْرِ شَهْرِ رَمَضَانَ بَعْدَ الْفَجْرِ أَفْطَرَ ثُمَّ قَالَ إِنَّ أَبِی کَانَ لَیْلَةً یُصَلِّی وَ أَنَا آکُلُ فَانْصَرَفَ فَقَالَ أَمَّا جَعْفَرٌ فَقَدْ أَکَلَ وَ شَرِبَ بَعْدَ الْفَجْرِ فَأَمَرَنِی فَأَفْطَرْتُ ذَلِکَ الْیَوْمَ فِی غَیْرِ شَهْرِ رَمَضَانَ.

📚 Al-Kafi, Vol. 4, p. 96

Imam Sadiq (peace be upon him) was asked about a person who eats suhoor (pre-dawn meal) during Ramadan and then leaves their room to find that Fajr has already arrived and it is bright outside. He said: 'They must complete their fast but also make up for that day!'

However, if outside of Ramadan, they eat suhoor after Fajr, they must break their fast.

He then said: 'One night, my father was praying while I was eating. After finishing his prayer, he said: "Ja‘far is eating and drinking after Fajr has risen!" So he instructed me to break my fast that day since it was outside of Ramadan.'

2⃣صَفْوَانُ بْنُ یَحْیَی عَنْ إِسْحَاقَ بْنِ عَمَّارٍ قَالَ: قُلْتُ لِأَبِی إِبْرَاهِیمَ یَکُونُ عَلَیَّ الْیَوْمُ وَ الْیَوْمَانِ مِنْ شَهْرِ رَمَضَانَ فَأَتَسَحَّرُ مُصْبِحاً أُفْطِرُ ذَلِکَ الْیَوْمَ وَ أَقْضِی مَکَانَ ذَلِکَ الْیَوْمِ یَوْماً آخَرَ أَوْ أُتِمُّ عَلَی صَوْمِ ذَلِکَ الْیَوْمِ وَ أَقْضِی یَوْماً آخَرَ فَقَالَ لَا بَلْ تُفْطِرُ ذَلِکَ الْیَوْمَ لِأَنَّکَ أَکَلْتَ مُصْبِحاً وَ تَقْضِی یَوْماً آخَرَ.

📚 Al-Kafi, Vol. 4, p. 97

Ishaq ibn Ammar said: 'I asked Imam Sadiq (peace be upon him): I have one or two missed fasts from Ramadan, and I eat suhoor after Fajr unknowingly. Should I break my fast and make up for that day later, or should I complete the fast and also fast another day as compensation?' The Imam replied: 'No! You must break your fast and make up for that day later because you ate after Fajr had arrived.'

3⃣عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْحُسَیْنِ بْنِ سَعِیدٍ عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ عَنْ عَلِیِّ بْنِ أَبِی حَمْزَةَ عَنْ أَبِی إِبْرَاهِیمَ قَالَ: سَأَلْتُهُ عَنْ رَجُلٍ شَرِبَ بَعْدَ مَا طَلَعَ الْفَجْرُ وَ هُوَ لَا یَعْلَمُ فِی شَهْرِ رَمَضَانَ قَالَ یَصُومُ یَوْمَهُ ذَلِکَ وَ یَقْضِی یَوْماً آخَرَ وَ إِنْ کَانَ قَضَاءً لِرَمَضَانَ فِی شَوَّالٍ أَوْ فِی غَیْرِهِ فَشَرِبَ بَعْدَ الْفَجْرِ فَلْیُفْطِرْ یَوْمَهُ ذَلِکَ وَ یَقْضِی.

📚 Al-Kafi, Vol. 4, p. 97

Ali ibn Abi Hamza said: 'I asked Imam Kazim (peace be upon him) about someone who unknowingly drinks water after Fajr during Ramadan. The Imam said: "They must complete the fast and also make up for it with another day. But if this happens with a makeup fast for Ramadan, whether in Shawwal or any other month, they must break their fast and make it up later."'

✅ Based on the above narrations, if someone outside of Ramadan mistakenly eats or drinks after Fajr, thinking it has not yet arrived, they cannot continue fasting as a voluntary or makeup fast. They must break their fast.

✅ The ruling differs for cases occurring in Ramadan. Related hadiths can be found at the link below:

https://t.me/porseshvapasokhe/1913

اللَّهُمَّ صَلِّ عَلَی مُحَمَّدٍ وَ آلِ مُحَمَّدٍ وَ عَجِّلْ لِوَلِیِّکَ الْفَرَجَ وَ الْعَافِیَةَ وَ النَّصْر

https://t.me/porseshvapasokhe