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
abudawud:4697 – Maḥmūd b. Khālid > al-Firyābī > Sufyān > ʿAlqamah b. Marthad > Sulaymān b. Buraydah > Ibn Yaʿmar Bihadhā al-Ḥadīth Yazīd And Yanquṣ > Famā al-Islām

What is Islam? He replied : It means saying prayer, payment of zakat, performing HAJJ, fasting during RAMADAN, and taking a bath on account of sexual defilement. Abu Dawud said: 'Alqamah was a Murji'i.  

أبو داود:٤٦٩٧ – حَدَّثَنَا مَحْمُودُ بْنُ خَالِدٍ حَدَّثَنَا الْفِرْيَابِيُّ عَنْ سُفْيَانَ قَالَ حَدَّثَنَا عَلْقَمَةُ بْنُ مَرْثَدٍ عَنْ سُلَيْمَانَ بْنِ بُرَيْدَةَ عَنِ ابْنِ يَعْمَرَ بِهَذَا الْحَدِيثِ يَزِيدُ وَيَنْقُصُ قَالَ فَمَا الإِسْلاَمُ قَالَ

إِقَامُ الصَّلاَةِ وَإِيتَاءُ الزَّكَاةِ وَحَجُّ الْبَيْتِ وَصَوْمُ شَهْرِ رَمَضَانَ وَالاِغْتِسَالُ مِنَ الْجَنَابَةِ  

قَالَ أَبُو دَاوُدَ عَلْقَمَةُ مُرْجِئٌ

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Collected by Suyūṭī
suyuti:10089a –
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السيوطي:١٠٠٨٩a –

"الإِسلامُ إِقامُ الصَّلاةِ، وإِيتَاءُ الزَّكَاةِ، وحَجُّ البَيتِ، وصومُ شَهْرِ رَمَضَانَ والاغْتسال من الجنابةِ".  

[د] أبو داود عن عمر