When praying while walking, one must stop to bow and prostrate on the ground

f6.1 Facing the direction of prayer (QIBLA) is a necessary condition for the prayer's validity, with the sole exceptions of praying in extreme peril (dis:f16.5) and nonobligatory prayers performed while travelling.

f6.2 (N: The rulings below deal with nonobligatory prayers, not the five prescribed ones, which must be performed while facing the proper direction for prayer(qibla) whether one is riding in a vehicle or not (dis:w24).)

A traveller may perform nonobligatory prayers riding or walking, even on short trips.

When riding and able to face the direction of prayer, prostrate, and bow, as when on a ship, one is obligated to. If not able, the one is only required to face the direction of prayer, during the first Allahu Akbar of the prayer, provided this is not difficult, as when one's mount is stationary or when one can turn oneself or one's mount the proper direction. If it is difficult , as one's mount is not properly saddle broken, or if the reins are not in one's hands, as when riding in a pack train with each animal tied to the one ahead of it, then it is not obligatory to face the direction of prayer at any point of the prayer's performance, and one merely nods in the direction of travel instead of bowing and prostrating. One's nod for prostration must be deeper than the nod for bowing. One does not have to bow to the limit of one's capacity, nor bow the forehead until it touches the mount's back, though this is permissible if oneself, though this is permissible if one trouble oneself to do so.

When praying while walking, one must stop to bow and prostrate on the ground (O: if easy, though if walking in mud, water, or snow, one may simply nod), and may walk during the rest of the prayer, though it is obligatory to face the direction of prayer during the first Allah Akbar and at each bowing and prostration.

Such prayers (O: whether riding or walking) are only valid on condition.

(a) that one's journey continue for the prayer's duration;

(b) and that one not turn from the direction of travel towards anything but the direction of prayer.

If one reaches home while thus praying, or the destination, or a town where one intends to stay, then one must face the direction of prayer, and bow and prostrate on the ground or on one's mount if stopped.