hardened

Lamentations 4:3
Even jackals offer their breasts to nurse their young, but the daughter of my people has become cruel, like an ostrich in the wilderness.

as

Deuteronomy 28:56, 57
The most gentle and refined woman among you, so gentle and refined she would not venture to set the sole of her foot on the ground, will begrudge the husband she embraces and her son and daughter . . .

1 Kings 3:26, 27
Then the woman whose son was alive spoke to the king because she yearned with compassion for her son. "My lord, " she said, "give her the living baby. Please do not kill him!" But the other woman said, "He will not be mine or yours. Cut him in two!" . . .

2 Kings 6:28, 29
Then the king asked her, "What is the matter?" And she answered, "This woman said to me, 'Give up your son, and we will eat him today, and tomorrow we will eat my son.' . . .

Lamentations 2:20
Look, O LORD, and consider: Whom have You ever treated like this? Should women eat their offspring, the infants they have nurtured? Should priests and prophets be killed in the sanctuary of the Lord?

Romans 1:31
They are senseless, faithless, heartless, merciless.

her labour

Ecclesiastes 10:15
The toil of a fool wearies him, for he does not know the way to the city.

Habakkuk 2:13
Is it not indeed from the LORD of Hosts that the labor of the people only feeds the fire, and nations weary themselves in vain?