本木に勝る末木なし
Meanings
1
the first is best; nothing surpasses the original
Proverb meaning that the first in a series (especially a first spouse or first love) is better than any that follow. Literally 'there is no branch that surpasses the main trunk'. Used to express that one's first partner or original thing is irreplaceable.
There is a proverb that says 'the first is best'.
He remarried, but he missed his former wife, saying that the first is best.