Allowing The Usage Of One Stone For Cleaning

It was narrated from Salamah bin Qais that the Messenger of Allah ﷺ said:

"When you clean yourselves (with stones, after defecating), use an odd number."

أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاَهِيمَ، قَالَ أَنْبَأَنَا جَرِيرٌ، عَنْ مَنْصُورٍ، عَنْ هِلاَلِ بْنِ يِسَافٍ، عَنْ سَلَمَةَ بْنِ قَيْسٍ، عَنْ رَسُولِ اللَّهِ ﷺ قَالَ " إِذَا اسْتَجْمَرْتَ فَأَوْتِرْ " .