"When you perform Wudu', sniff water in your nose and blow it out, and when you use small stones (to remove filth), then make it off (numbered)." (Using translation from Nasāʾī 89)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «إِذَا تَوَضَّأْتَ فَاسْتَنْثِرْ وَإِذَا اسْتَجْمَرْتَ فَأَوْتِرْ»  

"When you clean yourselves (with stones, after defecating), use an odd number." (Using translation from Nasāʾī 43)  

عَنْ رَسُولِ اللهِ ﷺ قَالَ «إِذَا اسْتَجْمَرْتَ فَأَوْتِرْ»