✅ Answer: Consider the following narrations regarding some prohibited actions in a cemetery:

عَنْ مُحَمَّدِ بْنِ سُلَیْمَانَ الدَّیْلَمِیِّ عَنْ أَبِیهِ عَنْ أَبِی عَبْدِ اللَّهِ قَالَ قَالَ رَسُولُ اللَّهِ صلی الله علیه و آله سِتَّةٌ کَرِهَهَا اللَّهُ لِی فَکَرِهْتُهَا لِلْأَئِمَّةِ مِنْ ذُرِّیَّتِی وَ لْتَکْرَهْهَا الْأَئِمَّةُ لِأَتْبَاعِهِمُ الْعَبَثُ فِی الصَّلَاةِ وَ الْمَنُّ بَعْدَ الصَّدَقَةِ وَ الرَّفَثُ فِی الصَّوْمِ وَ الضَّحِکُ بَیْنَ الْقُبُورِ وَ التَّطَلُّعُ فِی الدُّورِ وَ إِتْیَانُ الْمَسَاجِدِ جُنُباً الْحَدِیثَ

📚 *Mahasin*, Vol. 1, p. 10

Translation: Imam al-Sadiq (AS) said: The Messenger of Allah (PBUH) said: Six things are disliked by Allah for me, and I also consider them disliked for the Imams from my progeny, and the Imams consider them disliked and inappropriate for their followers: playing during prayer, giving charity with the intention of showing off, engaging in sexual activity while fasting, laughing in cemeteries, looking inside homes without permission, and entering the mosque while in a state of ritual impurity (janabah).

عَنْ حَمَّادِ بْنِ عَمْرٍو وَ أَنَسِ بْنِ مُحَمَّدٍ عَنْ أَبِیهِ جَمِیعاً عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ عَنْ آبَائِهِ فِی وَصِیَّةِ النَّبِیِّ صلی الله علیه و آله لِعَلِیٍّ قَالَ یَا عَلِیُّ تِسْعَةُ أَشْیَاءَ تُورِثُ النِّسْیَانَ أَکْلُ التُّفَّاحِ الْحَامِضِ وَ أَکْلُ الْکُزْبُرَةِ وَ الْجُبُنِّ وَ سُؤْرِ الْفَأْرَةِ وَ قِرَاءَةُ کِتَابَةِ الْقُبُورِ وَ الْمَشْیُ بَیْنَ امْرَأَتَیْنِ وَ طَرْحُ الْقَمْلَةِ وَ الْحِجَامَةُ فِی النُّقْرَةِ وَ الْبَوْلُ فِی الْمَاءِ الرَّاکِدِ

📚 *Man La Yahduruhu al-Faqih*, Vol. 4, p. 361

Translation: The Messenger of Allah (PBUH) said in a narration: O Ali, there are ten things that cause forgetfulness and memory loss: eating sour green apples, eating coriander, eating cheese, eating mouse leftovers, reading inscriptions on graves, walking between two women, removing lice (from clothes and body), cupping on the back of the neck, urinating in stagnant water.

مُحَمَّدُ بْنُ عَلِیِّ بْنِ الْحُسَیْنِ قَالَ قَالَ أَبُو الْحَسَنِ مُوسَی بْنُ جَعْفَرٍ إِذَا دَخَلْتَ الْمَقَابِرَ فَطَأِ الْقُبُورَ فَمَنْ کَانَ مُؤْمِناً اسْتَرْوَحَ إِلَی ذَلِکَ وَ مَنْ کَانَ مُنَافِقاً وَجَدَ أَلَمَهُ

📚 *Man La Yahduruhu al-Faqih*, Vol. 1, p. 180

Translation: Imam al-Kadhim (AS) said: When you enter the cemetery, do not step on the graves. Whoever is a believer will find peace and rest from this action, but whoever is a hypocrite will feel pain from it.

مُحَمَّدُ بْنُ عَلِیِّ بْنِ الْحُسَیْنِ بِإِسْنَادِهِ عَنْ سَمَاعَةَ بْنِ مِهْرَانَ أَنَّهُ سَأَلَ أَبَا عَبْدِ اللَّهِ عَنْ زِیَارَةِ الْقُبُورِ وَ بِنَاءِ الْمَسَاجِدِ فِیهَا فَقَالَ أَمَّا زِیَارَةُ الْقُبُورِ فَلَا بَأْسَ بِهَا وَ لَا تُبْنَی عِنْدَهَا مَسَاجِدُ

📚 *Man La Yahduruhu al-Faqih*, Vol. 3, p. 234

Translation: Samaa’ah asked Imam al-Sadiq (AS) about visiting graves and building mosques near them; Imam replied: Visiting graves is allowed, but mosques should not be built in cemeteries.

Note: Imam al-Kadhim (AS) in a hadith in *Wasa'il al-Shi'a*, Vol. 2, p. 869, prohibited sitting on graves.

اللَّهُمَّ فَصَلِّ عَلَی مُحَمَّدٍ وَ آلِ مُحَمَّدٍ وَ عَجِّلْ لِوَلِیِّکَ الْفَرَجَ وَ الْعَافِیَةَ وَ النَّصْرَ