Abdullah bin Umar reported,

When Umar embraced Islam, people gathered at his house, saying, "Umar has changed his religion."I was a boy on the roof of my house when a man wearing a brocade cloak came and said, "Umar has changed his religion. So what? I grant him my protection."I saw the people disperse from around him, so I asked, "Who is this?"They said, "Aas bin Waail."

Bukhari 3865

Sahih

حدثنا علي بن عبد الله حدثنا سفيان قال عمرو بن دينار سمعته قال قال

عبد الله بن عمر رضي الله عنهما

لما أسلم عمر اجتمع الناس عند داره وقالوا صبا عمر وأنا غلام فوق ظهر بيتي فجاء رجل عليه قباء من ديباج فقال قد صبا عمر فما ذاك فأنا له جار قال فرأيت الناس تصدعوا عنه فقلت من هذا قالوا العاص بن وائل

البخاري 3865صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Virtues of the Ansar
Chapter
Islam of Umar bin Khattab, may Allah be pleased with him
Numbering
Darussalam 3865
Bukhari 3865