不孝有三,无后为大

bù xiào yǒu sān , wú hòu wéi dà

there are three ways to be unfilial; having no sons is the worst (from Mencius 孟子[Meng4 zi3])

no; not so

xiào

filial piety or obedience

yǒu

to have; there is

sān

three

,

not to have

hòu

back

wéi

variant of 為|为[wei2]

big; large; great