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.
bayhaqi:6458Abū al-Qāsim ʿAbd al-Raḥman b. ʿUbaydullāh al-Ḥurfī > ʿAlī b. Muḥammad b. al-Zubayr > Ibrāhīm b. Isḥāq > Jaʿfar b. ʿAwn > Hishām b. Saʿd > Zayd b. Aslam > ʿAmr b. Saʿd companion of the neighbor a freed slave of ʿUmar b. al-Khaṭṭāb ؓ

[Machine] Umar ibn Al-Khattab passed by us returning from the Hajj pilgrimage, accompanied by a group of the companions of the Messenger of Allah ﷺ. He said, "Cleanse yourselves in the sea, for it is blessed." Then he called for the towels, and they descended and cleansed themselves.  

البيهقي:٦٤٥٨أَخْبَرَنَا أَبُو الْقَاسِمِ عَبْدُ الرَّحْمَنِ بْنُ عُبَيْدِ اللهِ الْحُرْفِيُّ بِبَغْدَادَ فِي الْحَرِّ حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدِ بْنِ الزُّبَيْرِ ثنا إِبْرَاهِيمُ بْنُ إِسْحَاقَ ثنا جَعْفَرُ بْنُ عَوْنٍ عَنْ هِشَامِ بْنِ سَعْدٍ ثنا زَيْدُ بْنُ أَسْلَمَ عَنْ عَمْرِو بْنِ سَعْدٍ صَاحِبِ الْجَارِ مَوْلَى عُمَرَ بْنِ الْخَطَّابِ ؓ قَالَ

مَرَّ بِنَا عُمَرُ بْنُ الْخَطَّابِ ؓ آتِيًا مِنَ الْحَجِّ وَمَعَهُ نَفَرٌ مِنْ أَصْحَابِ رَسُولِ اللهِ ﷺ فَقَالَ اغْتَسِلُوا مِنَ الْبَحْرِ فَإِنَّهُ مُبَارَكٌ ثُمَّ دَعَا بِمَنَادِيلَ فَنَزَلُوا وَاغْتَسَلُوا