Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
suyuti:2155a –
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السيوطي:٢١٥٥a –

"إذَا طَفَا السَّمَكُ عَلى الماء فلا تأكُلْه، وإذا جزرَ عنه البحرُ كُلهْ، وما كانَ على حافَّتَيه فكُلُه".  

ابن مردويه، [ق] البيهقى في السنن عن جابر

See similar narrations below:

Collected by Bayhaqī
bayhaqi:18989 – Abū al-Ḥasan b. ʿAbdān > Sulaymān b. Aḥmad al-Lakhmī > ʿAlī b. Isḥāq al-Aṣbahānī > Naṣr b. ʿAlī > Abū Aḥmad al-Zubayrī > Sufyān > Abū al-Zubayr > Jābir

[Machine] The Prophet ﷺ said, "If a fish floats on the water, do not eat it. And if the sea recedes from it, then eat it. And whatever is found on its banks, eat it." Sulayman said, "This hadith was not narrated by Sufyan except by Abu Ahmad."  

البيهقي:١٨٩٨٩ – أَخْبَرَنَاهُ أَبُو الْحَسَنِ بْنُ عَبْدَانَ أنبأ سُلَيْمَانُ بْنُ أَحْمَدَ اللَّخْمِيُّ ثنا عَلِيُّ بْنُ إِسْحَاقَ الْأَصْبَهَانِيُّ ثنا نَصْرُ بْنُ عَلِيٍّ ثنا أَبُو أَحْمَدَ الزُّبَيْرِيُّ ثنا سُفْيَانُ عَنْ أَبِي الزُّبَيْرِ عَنْ جَابِرٍ

عَنِ النَّبِيِّ ﷺ قَالَ إِذَا طَفَا السَّمَكُ عَلَى الْمَاءِ فَلَا تَأْكُلْهُ وَإِذَا جَزَرَ عَنْهُ الْبَحْرُ فَكُلْهُ وَمَا كَانَ عَلَى حَافَتِهِ فَكُلْهُ قَالَ سُلَيْمَانُ لَمْ يَرْفَعْ هَذَا الْحَدِيثَ عَنْ سُفْيَانَ إِلَّا أَبُو أَحْمَدَ