ENOfficial
Anas reported God's messenger as saying, "The last hour will not come till the cry `God, God' is not uttered in the earth." In a version he said, "The last hour will not come upon one who says, `God, God'." Muslim transmitted it.
Source: sunnah.com
Other translations
Arabic
عَنْ أَنَسٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: " لَا تَقُومُ السَّاعَةُ حَتَّى لَا يُقَالَ فِي الْأَرْضِ: اللَّهُ اللَّهُ ". وَفِي رِوَايَةٍ: " لَا تَقُومُ السَّاعَةُ عَلَى أَحَدٍ يَقُولُ: اللَّهُ الله ". رَوَاهُ مُسلم
sunnah.com