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رَبَّنَا آتِنَا فِي الدُّنْيَا حَسَنَةً وَفِي الْآخِرَةِ حَسَنَةً وَقِنَا عَذَابَ النَّارِ
The Prophet PBUH used to say between the Yemeni corner and the black stone: (O our Lord, grant us the best in this life and the best in the next life, and protect us from the punishment of the Fire.)
Source: Abu Dawud 2/179, Ahmad 3/411, Al-Baghawi Surah Al-Baqarah:201.