لِأَنَّهُ قَدْ رَوَى اَلْعِيصُ بْنُ اَلْقَاسِمِ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ : سَأَلْتُهُ عَنِ اَلرَّجُلِ يَغْتَسِلُ لِلْإِحْرَامِ بِالْمَدِينَةِ وَ يَلْبَسُ ثَوْبَيْنِ ثُمَّ يَنَامُ قَبْلَ أَنْ يُحْرِمَ قَالَ «لَيْسَ عَلَيْهِ غُسْلٌ ». ومن اغتسل أول الليل ثم أحرم آخر الليل أجزأه غسله.
English translationBab Ul Qaim Publications
Hadith.2544 - Al-‘Ays ibn al-Qasim narrated from Abu Abdullah (as) that he said: "I asked him about a man who performs ghusl for ihram in Medina, wears the two garments of ihram, and then sleeps before assuming ihram. Imam (as) replied: 'There is no need for him to repeat the ghusl.'"
Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.