Mishkat al-Masabih
Book 30, Hadith 65
Arabic hadith text
وَعَنِ ابْنِ عَبَّاسٍ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «اللَّهُمَّ أَعِزَّ الْإِسْلَامَ بِأَبِي جَهْلِ بْنِ هِشَامٍ أَوْ بِعُمَرَ بْنِ الْخَطَّابِ» فَأَصْبَحَ عُمَرُ فَغَدَا عَلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَأَسْلَمَ ثُمَّ صَلَّى فِي الْمَسْجِدِ ظَاهرا. رَوَاهُ أَحْمد وَالتِّرْمِذِيّ
Translation
Ibn `Abbas reported the Prophet as saying, "0 God, strengthen Islam with Abu Jahl b. Hisham, or `Umar b. al-Khattab." In the morning `Umar went to the Prophet and accepted Islam; then prayed openly in the mosque. Ahmad and Tirmidhi transmitted it.