Saying "May Allah protect you" (Hafizak Allah)
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا حَمَّادٌ، عَنْ ثَابِتٍ الْبُنَانِيِّ، عَنْ عَبْدِ اللَّهِ بْنِ رَبَاحٍ الأَنْصَارِيِّ، قَالَ حَدَّثَنَا أَبُو قَتَادَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ فِي سَفَرٍ لَهُ فَعَطِشُوا فَانْطَلَقَ سَرَعَانُ النَّاسِ فَلَزِمْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم تِلْكَ اللَّيْلَةَ فَقَالَ " حَفِظَكَ اللَّهُ بِمَا حَفِظْتَ بِهِ نَبِيَّهُ " .
Abu Qatadah said: The Prophet (ﷺ) was on journey. The people became thirsty, and they went quickly. I guarded the Messenger of Allah(ﷺ) on that night. He said: May Allah guard you for the reason you have guarded His Prophet!