In a dream it signifies reproach, and reminding someone of a paltry gift one gave him and publicizing it.
Whoever sees that he slaps someone jokingly will have a favor over him [or: the upper hand over him].
Whoever sees someone slapping him, that person has a favor over him. If a king slaps a king with whom he has enmity, the one slapped will triumph over the slapper, because the slapper has transgressed against him, and that is the custom of kings. A slap is a kindness that humbles the neck.