Abu Bakr came to me while Messenger of Allah ﷺ was sleeping with his head on my thigh. Abu Bakr said (to me), "You have detained Messenger of Allah ﷺ and the people, and there is no water in this place." So he admonished me and struck my flanks with his hand, and nothing could stop me from moving except the reclining of Messenger of Allah ﷺ (on my thigh), and then Allah revealed the Divine Verse of Tayammum.  

جَاءَ أَبُو بَكْرِ ؓ وَرَسُولُ اللَّهِ ﷺ وَاضِعٌ رَأْسَهُ عَلَى فَخِذِي فَقَالَ حَبَسْتِ رَسُولَ اللَّهِ ﷺ وَالنَّاسَ وَلَيْسُوا عَلَى مَاءٍ فَعَاتَبَنِي وَجَعَلَ يَطْعُنُ بِيَدِهِ فِي خَاصِرَتِي وَلاَ يَمْنَعُنِي مِنَ التَّحَرُّكِ إِلاَّ مَكَانُ رَسُولِ اللَّهِ ﷺ فَأَنْزَلَ اللَّهُ آيَةَ التَّيَمُّمِ