Sahih al-Bukhari, Volume 5, Book 57, Hadith 81 (USC-MSA) ⓘ
Narrated Usama bin Zaid: That the Prophet used to take him (i.e. Usama) and Al-Hassan (in his lap) and say: "O Allah! Love them, as I love them."
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا مُعْتَمِرٌ، قَالَ سَمِعْتُ أَبِي، حَدَّثَنَا أَبُو عُثْمَانَ، عَنْ أُسَامَةَ بْنِ زَيْدٍ ـ رضى الله عنهما ـ حَدَّثَ عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ كَانَ يَأْخُذُهُ وَالْحَسَنَ فَيَقُولُ " اللَّهُمَّ أَحِبَّهُمَا فَإِنِّي أُحِبُّهُمَا " .
also referenced under: Book 62, Hadith 83 (In-Book) & Hadith 3735 (DarusSalam)
The freed slave of Usama bin Zaid said, "Al-Hajjaj bin Aiman bin Um Aiman and Aiman Ibn Um Aiman was Usama's brother from the maternal side, and he was one of the Ansar. He was seen by Ibn 'Umar not performing his bowing and prostrations in a perfect manner. So Ibn 'Umar told him to repeat his prayer.
وَقَالَ نُعَيْمٌ عَنِ ابْنِ الْمُبَارَكِ، أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، أَخْبَرَنِي مَوْلًى، لأُسَامَةَ بْنِ زَيْدٍ. أَنَّ الْحَجَّاجَ بْنَ أَيْمَنَ ابْنِ أُمِّ أَيْمَنَ،، وَكَانَ، أَيْمَنُ ابْنُ أُمِّ أَيْمَنَ أَخَا أُسَامَةَ لأُمِّهِ، وَهْوَ رَجُلٌ مِنَ الأَنْصَارِ، فَرَآهُ ابْنُ عُمَرَ لَمْ يُتِمَّ رُكُوعَهُ وَلاَ سُجُودَهُ فَقَالَ أَعِدْ.
also referenced under: Book 62, Hadith 84 (In-Book) & Hadith 3736 (DarusSalam)
Harmala, the freed slave of Usama bin Zaid said that while he was in the company of 'Abdullah bin 'Umar, Al-Hajjaj bin Aiman came in and (while praying) he did not perform his bowing and prostrations properly. So Ibn 'Umar told him to repeat his prayer. When he went away, Ibn 'Umar asked me, "Who is he?" I said, "Al-Hajjaj bin Um Aiman." Ibn 'Umar said, "If Allah's Messenger saw him, he would have loved him." Then Ibn 'Umar mentioned the love of the Prophet for the children of Um Aiman. Sulaiman said that Um Aiman was one of the nurses of the Prophet.
قَالَ أَبُو عَبْدِ اللَّهِ وَحَدَّثَنِي سُلَيْمَانُ بْنُ عَبْدِ الرَّحْمَنِ، حَدَّثَنَا الْوَلِيدُ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ نَمِرٍ، عَنِ الزُّهْرِيِّ، حَدَّثَنِي حَرْمَلَةُ، مَوْلَى أُسَامَةَ بْنِ زَيْدٍ أَنَّهُ بَيْنَمَا هُوَ مَعَ عَبْدِ اللَّهِ بْنِ عُمَرَ إِذْ دَخَلَ الْحَجَّاجُ بْنُ أَيْمَنَ فَلَمْ يُتِمَّ رُكُوعَهُ وَلاَ سُجُودَهُ، فَقَالَ أَعِدْ. فَلَمَّا وَلَّى قَالَ لِي ابْنُ عُمَرَ مَنْ هَذَا قُلْتُ الْحَجَّاجُ بْنُ أَيْمَنَ ابْنِ أُمِّ أَيْمَنَ. فَقَالَ ابْنُ عُمَرَ لَوْ رَأَى هَذَا رَسُولُ اللَّهِ صلى الله عليه وسلم لأَحَبَّهُ، فَذَكَرَ حُبَّهُ وَمَا وَلَدَتْهُ أُمُّ أَيْمَنَ. قَالَ وَحَدَّثَنِي بَعْضُ أَصْحَابِي عَنْ سُلَيْمَانَ وَكَانَتْ حَاضِنَةَ النَّبِيِّ صلى الله عليه وسلم.
also referenced under: Book 62, Hadith 85 (In-Book) & Hadith 3737 (DarusSalam)