كَثُرَتْ أَيَادِي فُلَانٍ
“So-and-so has bestowed many favors.”
The word yad originally denotes a bodily hand, but here the intended sense is benefits or gifts. A hand is a familiar means of giving, so the name of the instrument is transferred to the benefit associated with it.
The benefit is not represented as visually similar to a hand. Rather, causal or instrumental association motivates the expression. This is majāz mursal.
Original expression: hand.
Intended sense: favors.
Relation: the hand's role in producing or dispensing gifts.