Asking Permission
Bukhari :: Book 8 :: Volume 74 :: Hadith 316
Narrated, 'Amr:
Ibn 'Umar said, "By Allah, I have not put a brick over a brick (i.e. constructed a building) or planted any date-palm tree since the death of the Prophet." Sufyan (the sub narrator) said, "I told this narration (of Ibn 'Umar) to one of his (Ibn 'Umar's) relatives, and he said, 'By Allah, he did build (something.' "Sufyan added, "I said, 'He must have said (the above narration) before he built."