Does the ablution of one who began by washing the nose before the mouth become invalidated?

The ablution is not invalidated by performing the sniffing of water into the nose (istanshaq) before rinsing the mouth (madhmadha). The order between them is considered commendable (mustahabb) by the Maliki school, and if one precedes the other, the purification is not invalidated. The Shafi'i school, in one opinion, holds that the order is considered deserving (mustahaqq), meaning that whoever performs istanshaq before madhmadha will have the istanshaq counted but not the madhmadha. However, the ablution is not invalidated because what was omitted is a sunnah. As for the opinion of commendability, all actions are counted.