«اِلرَّايِبْ مَا يِرْجَعْشْ حَلِيبْ»

The saying holds that some transformations run in one direction only. Once time or circumstance has reshaped something, whether a bond, a reputation, or a state of affairs, wishing or effort will not reverse the change. It counsels accepting the new reality instead of chasing a former condition that no longer exists.

It can also apply to the human life span, contrasting youth with old age. A person who has grown old cannot recover the freshness of earlier years, just as thickened milk cannot regain its original liquid state. In this sense the proverb carries a wistful, accepting tone about aging.

Say it when someone hopes to restore a situation, relationship, or condition that has fundamentally changed, or when reflecting on lost youth. It suits resigned or gently realistic remarks rather than harsh rebukes, and it works for people and circumstances alike.