(18) باب ذِكْرُ أُسَامَةَ بْنِ زَيْدٍ
Harmala, the freed slave of Usama bin Zaid saidthat while he was in the company of 'Abdullah bin 'Umar, Al-Hajjaj bin Aiman came inand (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 (ﷺ) saw him, he would have loved him." Then Ibn 'Umar mentioned the love of the Prophet (ﷺ) for the children of Um Aiman. Sulaiman said that Um Aiman was one of the nursesof the Prophet.
Reference: Sahih al-Bukhari 3737
In-book reference: Book 62, Hadith 85
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 5, Book 57, Hadith 81