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
quran:8:35 –

And their prayer at the House was not except whistling and handclapping. So taste the punishment for what you disbelieved.  

And their prayer at the ˹Sacred˺ House is nothing but whistling and hand-clapping: in other words they do this in place of the prayer which they were ordered to perform — therefore taste now, at Badr, the chastisement for your unbelief!
القرآن:٨:٣٥ –

وَمَا كَانَ صَلَاتُهُمْ عِنْدَ الْبَيْتِ إِلَّا مُكَاءً وَتَصْدِيَةً ۚ فَذُوقُوا الْعَذَابَ بِمَا كُنْتُمْ تَكْفُرُونَ  

{وما كان صلاتُهم عند البيت إلا مُكاءً} صفيرا {وتصديةً} تصفيقا أي جعلوا ذلك موضع صلاتهم التي أمروا بها {فذوقوا العذاب} ببدر {بما كنتم تكفرون}.