Sahih al-Bukhari, Book 64, Hadith 442 (In-Book) ⓘ
Narrated Ibn `Umar: Allah's Messenger said to his companions who were at Al-Hijr, "Do not enter upon these people who are being punished, except in a weeping state, lest the same calamity as of theirs should befall you..."
حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، حَدَّثَنَا مَالِكٌ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم لأَصْحَابِ الْحِجْرِ " لاَ تَدْخُلُوا عَلَى هَؤُلاَءِ الْمُعَذَّبِينَ إِلاَّ أَنْ تَكُونُوا بَاكِينَ، أَنْ يُصِيبَكُمْ مِثْلُ مَا أَصَابَهُمْ " .
also referenced under: Hadith 4420 (DarusSalam) & Volume 5, Book 59, Hadith 704 (USC-MSA)