百善孝為先

of all virtues filial piety is most important (idiom)

early / prior / former / in advance / first

hundred / numerous / all kinds of

good (virtuous) / benevolent / well-disposed / good at sth / to improve or perfect

filial piety or obedience / mourning apparel

as (in the capacity of) / to take sth as / to act as / to serve as / to behave as / to become / to be / to do / by (in the passive voice)

because of / for / to