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
muslim:23b – [Chain 1] Abū Bakr b. Abū Shaybah > Abū Khālid al-Aḥmar [Chain 2] Yazīd b. Hārūn > Abū Mālik from his father

He who held belief in the unity of Allah, and then narrated what has been stated above.  

مسلم:٢٣b – وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا أَبُو خَالِدٍ الأَحْمَرُ ح وَحَدَّثَنِيهِ زُهَيْرُ بْنُ حَرْبٍ حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ كِلاَهُمَا عَنْ أَبِي مَالِكٍ عَنْ أَبِيهِ

أَنَّهُ سَمِعَ النَّبِيَّ ﷺ يَقُولُ مَنْ وَحَّدَ اللَّهَ ثُمَّ ذَكَرَ بِمِثْلِهِ