Hadithcore
Sahih al-Bukhari, 3236
sahih

Narrated Samura:

The Prophet (ﷺ) said, "Last night I saw (in a dream) two men coming to me. One of them said, "The person who kindles the fire is Malik, the gate-keeper of the (Hell) Fire, and I am Gabriel, and this is Michael."

حَدَّثَنَا مُوسَى، حَدَّثَنَا جَرِيرٌ، حَدَّثَنَا أَبُو رَجَاءٍ، عَنْ سَمُرَةَ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏

‏ رَأَيْتُ اللَّيْلَةَ رَجُلَيْنِ أَتَيَانِي قَالاَ الَّذِي يُوقِدُ النَّارَ مَالِكٌ خَازِنُ النَّارِ، وَأَنَا جِبْرِيلُ، وَهَذَا مِيكَائِيلُ ‏

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References2 variants
In-Book Reference
Book 59, Hadith 47
USC-MSA web (English) reference
Vol. 4, Book 54, Hadith 459 (deprecated numbering scheme)