Musnad Ahmad 27:780

Waki’ narrated to us, Sufyan narrated to us, and ‘Abd al-Razzaq said: Sufyan informed us, from ‘Asim ibn ‘Ubayd Allah, from Salim, from Ibn ‘Umar, that ‘Umar sought permission from the Prophet, peace and blessings of Allah be upon him, for the ‘Umrah, and he gave him permission. He said: "O my brother, include us in your righteous supplication and do not forget us." ‘Abd al-Razzaq said in his narration: So ‘Umar said: "I would not love that I have in exchange for it [that] upon which the sun rises."