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:55:20 –

Between them is a barrier ˹so˺ neither of them transgresses.  

Between them there is a barrier, by His power, exalted be He. They do not overstep, neither of the two encroaches upon the other to become mixed with it.
القرآن:٥٥:٢٠ –

بَيْنَهُمَا بَرْزَخٌ لَا يَبْغِيَانِ  

{بينهما برزخ} حاجز من قدرته تعالى {لا يبغيان} لا يبغي واحد منهما على الآخر فيختلط به.