Which idiom describes parents' love for their children?

Idioms describing parents' love for their children are as follows: the old calf loves deeply, the calf loves, blood is thicker than water, the father loves mountains, the mother loves the sea, Meng Mu moved three times, the father is filial, the blood is thicker than water, the grass is full of spring, the flesh and blood are connected, and the parents are kind.

Love is free pay, willing help and mutual telepathy. Since you have chosen love, you should treat it sincerely, cherish it, support him (her) when he (she) is in trouble, encourage him (her) when he (she) fails, be happy together when he (she) is happy, and comfort him (her) when he (she) is sad.

Instead of ignoring its existence when you have it, you will know your regret after you lose it. If you love someone, you must always be happy, be his/her eternal refuge and protect him/her, even if it hurts a little.

True love for someone is not as simple as we thought, a deep hug, a deep kiss, an unchangeable oath and an indelible token? All this is plain in the face of true love.