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:2328Abū Bakr Aḥmad b. al-Ḥusayn al-Qāḍī > Ḥājib b. Aḥmad al-Ṭūsī > ʿAbdullāh b. Hāshim > Wakīʿ > Sufyān > Simāk b. Ḥarb > Qabīṣah b. Hulb from his father

[Machine] I saw the Messenger of Allah ﷺ placing his right hand on his left hand in prayer. A person called Yazid ibn Qunafa did the same, and we heard from Al-Harith ibn Ghudayf Al-Kindi and Shaddad ibn Shurahbil Al-Ansari that each of them saw the Prophet ﷺ doing the same.  

البيهقي:٢٣٢٨أَخْبَرَنَاهُ أَبُو بَكْرٍ أَحْمَدُ بْنُ الْحُسَيْنِ الْقَاضِي أنبأ حَاجِبُ بْنُ أَحْمَدَ الطُّوسِيُّ ثنا عَبْدُ اللهِ بْنُ هَاشِمٍ ثنا وَكِيعٌ ثنا سُفْيَانُ عَنْ سِمَاكِ بْنِ حَرْبٍ عَنْ قَبِيصَةَ بْنِ هُلْبٍ عَنْ أَبِيهِ قَالَ

رَأَيْتُ رَسُولَ اللهِ ﷺ وَاضِعًا يَمِينَهُ عَلَى شِمَالِهِ فِي الصَّلَاةِ هُلْبٌ اسْمُهُ يَزِيدُ بْنُ قُنَافَةَ وَرُوِّينَا عَنِ الْحَارِثِ بْنِ غُضَيْفٍ الْكِنْدِيِّ وَشَدَّادِ بْنِ شُرَحْبِيلَ الْأَنْصَارِيِّ أَنَّ كُلَّ وَاحِدٍ مِنْهُمَا رَأَى النَّبِيَّ ﷺ فَعَلَ ذَلِكَ