“In Islamic belief, Maalik (Arabic: مالك, romanized: mālik) denotes an angel in Hell/Purgatory (Arabic: جهنم, romanized: jahannam) who administrates the Hellfire, assisted by 19 mysterious guards (Sura 74:30) known as Zabaniyya (Arabic: الزبانية, romanized: az-zabānīya). In the Qur'an, Maalik is mentioned in Sura 43:77 as the chief of angels of hell. The earliest codices offer various alternative spellings of this word including malak, meaning "angel", instead of a proper name.[1]
According to Islamic tradition, Muhammad met the angel Maalik during his heavenly journey. Therefore, Muhammad arrived in heaven and all the angels greeted him with a smile except Maalik. When Muhammad asked Jibra'il, why he remains taciturn therefore, he reveals Maalik as the guardian of Hell who never smiles. After that, Muhammad asked him to show Hell and Maalik opened its gates, showing him a glimpse of suffering for the inmates.[2][3]“
—Wikipedia