He asked permission from the Prophet ﷺ to perform Umra. The Prophet ﷺ said, "My brother, include us in your prayers and do not forget us."
حدثنا سفيان بن وكيع حدثنا أبي عن سفيان عن عاصم بن عبيد الله عن سالم عن ابن عمر
أنه استأذن النبي ﷺ في العمرة فقال أي أخي أشركنا في دعائك ولا تنسنا
[Its chain is daif] Ibn Majah narrated it in the Book of Pilgrimage Rites, Chapter on the Merit of the Pilgrim's Supplication, no. 2894, from the hadith of Waki, and Abu Dawud, no. 1498, from the hadith of Asim bin Ubaydullah, through the same route, and it is daif.