Sahih (Sahih Muslim)
حَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا جَرِيرٌ، عَنْ سُهَيْلٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " تَضَمَّنَ اللَّهُ لِمَنْ خَرَجَ فِي سَبِيلِهِ - إِلَى قَوْلِهِ - مَا تَخَلَّفْتُ خِلاَفَ سَرِيَّةٍ تَغْزُو فِي سَبِيلِ اللَّهِ تَعَالَى " .
Another version of the tradition narrated through a different chain of transmitters on the authority of Abu Huraira has the same wording as the previous tradition:" Allah takes care of one who goes out in the way of Allah" but ends in the words:" I would not lag behind any expedition which is undertaken to fight in the way of Allah, the Exalted