Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:37:55 –

And he will look and see him in the midst of the Hellfire.  

Then he, that speaker, will take a look, through one of the apertures in Paradise, and he will catch sight of him, that is, he will see his comrade, in the centre of Hell, in the middle of the Fire.
القرآن:٣٧:٥٥ –

فَاطَّلَعَ فَرَآهُ فِي سَوَاءِ الْجَحِيمِ  

{فاطلع} ذلك القائلون من بعض كوى الجنة {فرآه} أي رأى قرينه {في سواء الجحيم} في وسط النار.