Abu Musa Ashari reported,

The Prophet ﷺ entered a garden and instructed me to guard the gate. A man came seeking permission to enter, and the Prophet ﷺ said, "Let him in and give him the glad tidings of Paradise." It turned out to be Abu Bakr.Then Umar came, and he said, "Let him in and give him the glad tidings of Paradise."Then Uthman came, and he said, "Let him in and give him the glad tidings of Paradise."

Bukhari 7262

Sahih

حدثنا سليمان بن حرب حدثنا حماد بن زيد عن أيوب عن أبي عثمان

عن أبي موسى

أن النبي ﷺ دخل حائطا وأمرني بحفظ الباب فجاء رجل يستأذن فقال ائذن له وبشره بالجنة فإذا أبو بكر ثم جاء عمر فقال ائذن له وبشره بالجنة ثم جاء عثمان فقال ائذن له وبشره بالجنة

البخاري 7262صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Reports of single narrators
Chapter
Allah's saying, "Do not enter the houses of the Prophet unless permission is given to you"
Numbering
Darussalam 7262
Bukhari 7262