بُلُوغُ الْمَرَامِ
Bulugh al-Maram 312
The Book of Prayer
اِبْنِ عُمَرَ - رضى الله عنه - صَحَّحَهُ اِبْنُ خُزَيْمَةَ , وَذَكَرَهُ اَلْبُخَارِيُّ مُعَلَّقًا مَوْقُوفًا . [1]
of Ibn 'Umar (RA) (coming next), which is authenticated by Ibn Khuzaimah. al-Bukhari mentioned it as a Hadith Mu'allaq (missing links from the side of the Haditb collector) and Mawquf (saying of a companion).
Sunnah.com reference: Book 2, Hadith 200