وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عَبْدُ الأَعْلَى، عَنِ الْجُرَيْرِيِّ، عَنْ عَبْدِ اللَّهِ، بْنِ بُرَيْدَةَ عَنْ عَبْدِ اللَّهِ بْنِ مُغَفَّلٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم ‏.‏ مِثْلَهُ إِلاَّ أَنَّهُ قَالَ فِي الرَّابِعَةِ ‏ "‏ لِمَنْ شَاءَ ‏"‏ ‏.‏

This hadith has been narrated by Abdullah b. Mughaffal by another chain of transmitters, but with this variation that he (the Holy Prophet) said at the fourth time: " He who wishes (may do to)."

— Sahih Muslim, Book 6: The Book of Prayer - Travellers, Hadith #1833