Abu Dawud Book 4, Hadith Number 1807.
Chapter : Not known.
Narated By Abdullah ibn Abbas : The Prophet (PBUH) heard a man say: Labbayk (always ready to obey) on behalf of Shubrumah. He asked: Who is Shubrumah? He replied: A brother or relative of mine. He asked: Have you performed hajj on your own behalf? He said: No. He said: perform hajj on your own behalf, then perform it on behalf of Shubrumah.