Hadith 8:1551
Abu Bakr narrated to us, he said: Ghundar narrated to us, from Ash'ath, from al-Hasan, that he was asked about a man who was ignorant [of the requirement to enter into ihram] until he entered Makkah. He said: If he considers it a grave matter, he should enter into ihram from his place. Al-Hasan also said: He should return to his boundary (miqat) and enter into ihram from there, unless he fears missing [the Hajj]. If he fears missing it, he should enter into ihram from his place and proceed, and there is nothing upon him.
حدثنا أبو بكر قال حدثنا غندر عن أشعث عن الحسن أنه سئل عن رجل جهل حتى دخل مكة قال إن كان عظم قوله يهل من مكانه وقد قال الحسن أيضا يرجع إلى حده فيهل منه إلا أن يخشى الفوت فإن خشي الفوت أهل من مكانه ومضى ولا شيء عليه