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
bukhari:3751 – Yaḥyá b. Maʿīn And Ṣadaqah > Muḥammad b. Jaʿfar > Shuʿbah > Wāqid b. Muḥammad from his father > Ibn ʿUmar

Abu Bakr used to say, "Look after Muhammad ﷺ in (looking after) his family."  

البخاري:٣٧٥١ – حَدَّثَنِي يَحْيَى بْنُ مَعِينٍ وَصَدَقَةُ قَالاَ أَخْبَرَنَا مُحَمَّدُ بْنُ جَعْفَرٍ عَنْ شُعْبَةَ عَنْ وَاقِدِ بْنِ مُحَمَّدٍ عَنْ أَبِيهِ عَنِ ابْنِ عُمَرَ ؓ قَالَ

قَالَ أَبُو بَكْرٍ ارْقُبُوا مُحَمَّدًا ﷺ فِي أَهْلِ بَيْتِهِ  

See similar narrations below:

Collected by Bukhārī, Suyūṭī
bukhari:3713 – ʿAbdullāh b. ʿAbd al-Wahhāb > Khālid > Shuʿbah > Wāqid > Abū > Ibn ʿUmar > Abū Bakr

Look at Muhammad through his family (i.e. if you are no good to his family you are not good to him).  

البخاري:٣٧١٣ – أَخْبَرَنِي عَبْدُ اللَّهِ بْنُ عَبْدِ الْوَهَّابِ حَدَّثَنَا خَالِدٌ حَدَّثَنَا شُعْبَةُ عَنْ وَاقِدٍ قَالَ سَمِعْتُ أَبِي يُحَدِّثُ عَنِ ابْنِ عُمَرَ عَنْ أَبِي بَكْرٍ ؓ قَالَ

ارْقُبُوا مُحَمَّدًا ﷺ فِي أَهْلِ بَيْتِهِ