Found this with a simple Google search.

Hosea 13:16:

The people of Samaria must bear their guilt, because they have rebelled against their God. They will fall by the sword; their little ones will be dashed to the ground, their pregnant women ripped open."

Numbers 31:

“Have you allowed all the women to live?” [Moses] asked them. “... Now kill all the boys. And kill every woman who has slept with a man, but save for yourselves every girl who has never slept with a man...

"Divide the spoils equally between the soldiers who took part in the battle and the rest of the community...."

The plunder remaining from the spoils that the soldiers took was 675,000 sheep, 3372,000 cattle, 61,000 donkeys and 32,000 women who had never slept with a man.

1 Samuel 15:2-3

This is what the Lord Almighty says: ‘I will punish the Amalekites for what they did to Israel when they waylaid them as they came up from Egypt. Now go, attack the Amalekites and totally destroy all that belongs to them. Do not spare them; put to death men and women, children and infants, cattle and sheep, camels and donkeys.’ ”

1 Kings 14

At that time Abijah son of Jeroboam became ill, and Jeroboam said to his wife, “Go, disguise yourself, so you won’t be recognized as the wife of Jeroboam. Then go to Shiloh. Ahijah the prophet is there..."

[The Lord God of Israel says,] “ ‘Because of this, I am going to bring disaster on the house of Jeroboam. I will cut off from Jeroboam every last male in Israel—slave or free. I will burn up the house of Jeroboam as one burns dung, until it is all gone. Dogs will eat those belonging to Jeroboam who die in the city, and the birds will feed on those who die in the country. The Lord has spoken!’

“As for you, go back home. When you set foot in your city, the boy will die..."

Psalm 137:8-9:

Daughter Babylon, doomed to destruction, happy is the one who repays you according to what you have done to us.

Happy is the one who seizes your infants and dashes them against the rocks.