When the water got too deep for the horse to touch the bottom of the river, the rider dismounted from the horse at its neck, helped it with going forward holding the bit, and then the rider moved behind the horse to drive it on.
ウマの足のたたないところにくると平首に沿って下り、轡をとりたすけてすすみ、臀後にしりぞいてうちわたした。