ENOfficial
‘Uthman b. Abu 'Atikah said : The only reason why he asked whether the whole of him should come in was because of the smallness of the tent
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا صَفْوَانُ بْنُ صَالِحٍ، حَدَّثَنَا الْوَلِيدُ، حَدَّثَنَا عُثْمَانُ بْنُ أَبِي الْعَاتِكَةِ، قَالَ إِنَّمَا قَالَ أَدْخُلُ كُلِّي . مِنْ صِغَرِ الْقُبَّةِ .
sunnah.com