从一以终 Origin — Chinese Character Wiki

cóngyīyǐzhōng

to be faithful until the end

从從 cóng verb

to comply with

To obey; to follow a principle, rule, or custom; to listen to
一 yī numeral

one

one; the number 1; single; alone
以 yǐ preposition

by means of

to use; by means of; with; using the tool or method introduced
终終 zhōng adverbadjective

end

(bound form) end; finish; the final stage or conclusion of something, opposite of 始 shǐ