Ibn ‘Umar said that a man questioned him saying,“When I pray in my house and then come to the mosque in time for prayer along with the imam, should I pray along with him?”He replied,“Yes.”The man asked which of them he should consider his obligatory prayer, and Ibn ‘Umar replied,“Is that your affair?* that is only to be left to God’s decision who will appoint whichever He wishes.”*The Arabic is in the form of a statement, but in view of the phrase immediately following it seems necessary to treat it as a question. Malik transmitted it.