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:808Abū ʿAlī al-Rūdhbārī And ʾAbū al-Ḥusayn b. Bishrān > Ismāʿīl b. Muḥammad al-Ṣaffār > Saʿdān b. Naṣr > Wakīʿ > Sufyān > al-Aghar > Khalīfah b. Ḥuṣayn

[Machine] That his grandfather, Qais bin Asim, came to the Prophet ﷺ wanting to convert, so the Prophet ﷺ ordered him to perform ablution with water and sidr (a type of tree) and with their meanings.  

البيهقي:٨٠٨كَمَا أَخْبَرَنَا أَبُو عَلِيٍّ الرُّوذْبَارِيُّ وَأَبُو الْحُسَيْنِ بْنُ بِشْرَانَ قَالَا ثنا إِسْمَاعِيلُ بْنُ مُحَمَّدٍ الصَّفَّارُ ثنا سَعْدَانُ بْنُ نَصْرٍ ثنا وَكِيعٌ عَنْ سُفْيَانَ عَنِ الْأَغَرِّ عَنْ خَلِيفَةَ بْنِ حُصَيْنٍ

أَنَّ جَدَّهُ قَيْسَ بْنَ عَاصِمٍ أَتَى النَّبِيَّ ﷺ يُرِيدُ أَنْ يُسْلِمَ فَأَمَرَهُ النَّبِيُّ ﷺ أَنْ يَغْتَسِلَ بِمَاءٍ وَسِدْرٍ وَبِمَعْنَاهُ  

رَوَاهُ مُحَمَّدُ بْنُ كَثِيرٍ وَجَمَاعَةٌ إِلَّا أَنَّ أَكْثَرَهُمْ قَالُوا عَنْ جَدِّهِ قَيْسِ بْنِ عَاصِمٍ وَرَوَاهُ قَبِيصَةُ بْنُ عُقْبَةَ فَزَادَ فِي إِسْنَادِهِ