✅ Answer: Pay attention to the following narrations:

1⃣عَنْ عَلِیِّ بْنِ جَعْفَرٍ عَنْ أَخِیهِ أَبِی الْحَسَنِ قَالَ سَأَلْتُهُ عَنْ قَصِّ الشَّارِبِ أَ مِنَ السُّنَّةِ قَالَ نَعَم

📚 Al-Kafi, Vol. 6, p. 487

Ali ibn Ja'far said: I asked Imam Kazim, peace be upon him, about trimming the mustache, whether it is a tradition. He replied: Yes.

2⃣عَنِ السَّکُونِیِّ عَنْ أَبِی عَبْداللَّهِ قال: قَالَ رَسُولُ اللَّهِ مِنَ السُّنَّةِ أَنْ تَأْخُذَ مِنَ الشَّارِبِ حَتَّی یَبْلُغَ الْإِطَار

📚 Al-Kafi, Vol. 6, p. 487

Imam Sadiq, peace be upon him, said: The Messenger of Allah, peace and blessings be upon him and his family, said: It is a tradition to trim the mustache short until it reaches the line between the growing of hair and the upper lip.

📚 Al-Kafi, Vol. 6, p. 487

3⃣عَنِ السَّکُونِیِّ عَنْ أَبِی عَبْداللَّهِ قال قَالَ رَسُولُ اللَّه لَا یُطَوِّلَنَّ أَحَدُکُمْ شَارِبَهُ فَإِنَّ الشَّیْطَانَ یَتَّخِذُهُ مَخْبَأً یَسْتَتِرُ بِه

Imam Sadiq, peace be upon him, said: None of you should ever raise his mustache high because Satan places his hiding place there to conceal himself!

📚 Al-Kafi, Vol. 6, p. 487

4⃣عَنِ ابْنِ فَضَّالٍ عَمَّنْ ذَکَرَهُ عَنْ أَبی عَبْداللَّه قال: ذَکَرْنَا الْأَخْذَ مِنَ الشَّارِبِ

فَقَالَ نُشْرَةٌ و هُوَ مِنَ السُّنَّة

Someone said: We mentioned trimming the mustache, so Imam Sadiq, peace be upon him, said: This action brings joy and freedom (from sorrow and distress)!

📚 Al-Kafi, Vol. 6, p. 487

5⃣عَنْ عَبْداللَّهِ بْنِ عُثْمَان أَنَّهُ رَأَی أَبا عَبْدِاللَّه أَحْفَی شَارِبَهُ حَتَّی أَلْصَقَهُ بِالْعَسِیب

Abdullah saw Imam Sadiq, peace be upon him, trim the hair of his mustache until it reached the root of the mustache, then he attached it to the root of the mustache!

6⃣قَالَ رَسُولُ اللَّهِ إِنَّ الْمَجُوسَ جَزُّوا لِحَاهُمْ وَ وَفَّرُوا شَوَارِبَهُمْ وَ إِنَّا نَحْنُ نَجُزُّ الشَّوَارِبَ و نُعْفِي اللِّحَى وَ هِيَ الْفِطْرَة

📚 Al-Faqih, Vol. 1, p. 130

The Messenger of Allah, peace and blessings be upon him and his family, said: The Majoos (Zoroastrians) plucked their beard hair and made their mustaches long and bushy, but we trim our mustaches and let our beard hair grow long and bushy. That is the natural way.

📚 Ma'ani al-Akhbar, Vol. 1, p. 291

7⃣عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ عَنْ أَبِيهِ عَنْ جَدِّهِ قَالَ: قَالَ رَسُولُ اللَّهِ حُفُّوا الشَّوَارِبَ وَ أَعْفُوا اللِّحَى وَ لَا تَشَبَّهُوا بِالْمَجُوس

The Messenger of Allah, peace and blessings be upon him and his family, said: Trim the mustaches and let the beard hair grow long and bushy. Do not resemble the Majoos!

📚 Al-Kafi, Vol. 1, p. 346

8⃣عَنْ حَبَابَةَ الْوَالِبِيَّةِ قَالَتْ رَأَيْتُ أَمِيرالْمُؤْمِنِينَ فِي شُرْطَةِ الْخَمِيسِ وَ مَعَهُ دِرَّةٌ لَهَا سَبَابَتَانِ يَضْرِبُ بِهَا بَيَّاعِي الْجِرِّيِّ وَ الْمَارْمَاهِي وَ الزِّمَّارِ وَ يَقُولُ لَهُمْ يَا بَيَّاعِي مُسُوخِ بَنِي إِسْرَائِيلَ و جُنْدِ بَنِي مَرْوَانَ فَقَامَ إِلَيْهِ فُرَاتُ بْنُ أَحْنَفَ فَقَالَ يَا أَمِيرالْمُؤْمِنِينَ مَا جُنْدُ بَنِي مَرْوَان قَالَ فَقَالَ لَهُ أَقْوَامٌ حَلَقُوا اللِّحَى و فَتَلُوا الشَّوَارِبَ فَمُسِخُوا

Habbah and Al-Bayhah say: I saw Imam Ali, peace be upon him, in the forces of al-Khamees (special forces of Imam Ali, peace be upon him), carrying a quiver with two ends. He used it to strike the sellers of locusts, snakes, and fish (which are three kinds of fish without scales and are prohibited). He would say to them: O sellers of the disfigured ones from the Children of Israel and the army of Bani Marwan! Farat ibn Ahnaf approached him and said: O Commander of the Faithful, who were the army of Bani Marwan? Imam Ali, peace be upon him, replied: They were a people who shaved their beards and let their mustaches grow long and bushy, and as a result, they became disfigured.

✅ In the book 📚Musbah al-Muneer p. 308 and the book 📚Majma' al-Bahrain Vol. 2 p. 78, and many other lexicons, the meaning of mustache is mentioned as follows:

Meaning: Mustache refers to the hair that hangs over the mouth and upper lip.

الشَّعْرُ الَّذِی یَسِیلُ عَلَی الْفَمِ

Based on these narrations, raising the hair above the upper lip that hangs over the mouth is discouraged, especially on Fridays. It is recommended to trim these hairs to the extent that the upper lip line is reached.

✅ Complete shaving of all the hairs above the upper lip, as is the common practice today, is not explicitly mentioned in Shia narrations. To follow Shia traditions, it is sufficient to trim the hanging hairs on the mouth and upper lip so that the upper lip line is completely free of hair, or the hairs above the upper lip are shortened to achieve this.

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