Hadith 5416
وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: لَا تَذْهَبُ الْأَيَّامُ وَاللَّيَالِي حَتَّى يَمْلِكَ رَجُلٌ يُقَالُ لَهُ: الْجَهْجَاهُ . وَفِي رِوَايَةٍ: حَتَّى يَمْلِكَ رَجُلٌ مِنَ الْمَوَالِي يُقَالُ لَهُ: الجَهجاه . رَوَاهُ مُسلم
He reported God's messenger as saying, "Days and nights will not pass away before a man called al-Jahjah rules." A version has "Before one of the clients called al-Jahjah rules." Muslim transmitted it.