A man entered the mosque and prayed, then came and greeted the Prophet ﷺ. The narrator mentioned the hadith, in which the Messenger of Allah ﷺ said, "When you stand for prayer, perform the ablution thoroughly, then face the qiblah and say the takbir…" and the rest of the hadith.
أن رجلا دخل المسجد فصلى، ثم جاء فسلم على النبي ﷺ. فذكر الحديث، وقال: فقال رسول الله ﷺ: إذا قمت إلى الصلاة فأسبغ الوضوء، ثم استقبل القبلة، فكبر… الحديث.
Bukhari narrated it in the Book of Oaths and Vows (6667), and Muslim in the Book of Prayer (397:46), both from the hadith of Abu Usama, who said, we were told by Ubaydullah bin Umar, from Saeed bin Abu Saeed, from Abu Hurairah, who related it in a long hadith that will come later.