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:1615a –
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السيوطي:١٦١٥a –

"إذا جئْتُم والإِمامُ راكِعٌ فارْكعوا، وإنْ كان ساجِدًا فاسْجُدوا، ولا تَعْتَدُّوا بالسُّجودِ إِذَا لمْ يكنْ معه الركوعُ".  

[ق] البيهقى في السنن عن رجل

See similar narrations below:

Collected by Bayhaqī
bayhaqi:2576 – Abū ʿAbdullāh al-Ḥāfiẓ > Muḥammad b. Aḥmad b. Bālawayh > Muḥammad b. Ghālib > ʿAmr b. Marzūq > Shuʿbah > ʿAbd al-ʿAzīz b. Rufayʿ > a man

[Machine] On the authority of the Prophet Muhammad ﷺ , he said: "When you come [to join the congregational prayer] and the imam is in the state of ruku' (bowing), then you should also bow. And if the imam is in the state of sujood (prostration), then you should also prostrate. And do not precede the imam in performing sujood if he has not yet performed ruku'."  

البيهقي:٢٥٧٦ – أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ أَخْبَرَنِي مُحَمَّدُ بْنُ أَحْمَدَ بْنِ بَالَوَيْهِ ثنا مُحَمَّدُ بْنُ غَالِبٍ حَدَّثَنِي عَمْرُو بْنُ مَرْزُوقٍ أنبأ شُعْبَةُ عَنْ عَبْدِ الْعَزِيزِ بْنِ رُفَيْعٍ عَنْ رَجُلٍ

عَنِ النَّبِيِّ ﷺ قَالَ إِذَا جِئْتُمْ وَالْإِمَامُ رَاكِعٌ فَارْكَعُوا وَإِنْ كَانَ سَاجِدًا فَاسْجُدُوا وَلَا تَعْتَدُّوا بِالسُّجُودِ إِذَا لَمْ يَكُنْ مَعَهُ الرُّكُوعُ