وَحَدَّثَنِي مَالِكٌ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ أَبِيهِ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، دَخَلَ عَلَى أَبِي بَكْرٍ الصِّدِّيقِ وَهُوَ يَجْبِذُ لِسَانَهُ فَقَالَ لَهُ عُمَرُ مَهْ غَفَرَ اللَّهُ لَكَ ‏.‏ فَقَالَ أَبُو بَكْرٍ إِنَّ هَذَا أَوْرَدَنِي الْمَوَارِدَ ‏.‏

Malik related to me from Zayd ibn Aslam from his father that Umaribn al-Khattab came upon Abu Bakr as-Siddiq pulling his tongue. Umarsaid to him, "Stop, may Allah forgive you!" Abu Bakr replied, "Thishas brought me to dangerous places." Translation Not Available

Book Ref: Muwatta Imam Malik Book 56 Hadith 1825
Web Ref:  Muwatta Imam Malik Book 56 Hadith 12