'Mourning' in the Bible

Therefore thus says Yahweh, the God of Armies, the Lord: "Wailing will be in all the broad ways; and they will say in all the streets, 'Alas! Alas!' and they will call the farmer to mourning, and those who are skillful in lamentation to wailing.

I will turn your feasts into mourning, and all your songs into lamentation; and I will make you wear sackcloth on all your bodies, and baldness on every head. I will make it like the mourning for an only son, and its end like a bitter day.