Here are some verses that pertain to the cold-blooded murder of children:
Genesis 22:2: And [the Lord] said, "Take now thy son, thine only son Isaac, whom thou lovest, and get thee into the land of Moriah; and offer him there for a burnt offering upon one of the mountains which I will tell thee of."
Exodus 11:4-5: And Moses said, "Thus saith the LORD, 'About midnight will I go out into the midst of Egypt, and all the firstborn in the land of Egypt shall die....'" (other verses pertain to this slaughter as well)
Numbers 16:27-32: ... And Dathan and Abiram came out, and stood in the door of their tents, and their wives, and their sons, and their little children. And Moses said, "Hereby ye shall know that the LORD hath sent me to do all these works...." And it came to pass, as he had made an end of speaking all these words, that the ground clave asunder that was under them, and the earth opened her mouth, and swallowed them up, and their houses, and all the men that appertained unto Korah, and all their goods.
Numbers 31:15-18: And Moses said unto them, "Have ye saved all the women alive? ... Now therefore kill every male among the little ones, and kill every woman that hath known man by lying with him. But all the women children, that have not known a man by lying with him, keep alive for yourselves."
Deut. 2:34: And we took all his cities at that time, and utterly destroyed the men, and the women, and the little ones, of every city, we left none to remain....
Deut. 3:6: And we utterly destroyed them, as we did unto Sihon king of Heshbon, utterly destroying the men, women, and children, of every city.
Joshua 6:21, 8:26, 10:28-40, among many others: Joshua slays the entire populations of cities upon the Lord's command.
1 Sam. 15:3: [The Lord said,] "Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass." Side note: This command was given by the Lord to Saul, and the Lord was angry because Saul disobeyed it. Saul killed all the women and children and babies and all of the men, except one, the king. Saul also spared some of the best animals temporarily, intending to kill them later as sacrifices. The prophet Samuel set out to fix things by taking the Amalekite king, who was unarmed and presenting no resistance, and hacking him to pieces with a sword.
2 Kings 2:23-24: And he [Elisha] went up from thence unto Bethel: and as he was going up by the way, there came forth little children out of the city, and mocked him, and said unto him, "Go up, thou bald head; go up, thou bald head." And he turned back, and looked on them, and cursed them in the name of the LORD. And there came forth two she bears out of the wood, and tare forty and two children of them.
Psalms 137:9: Happy shall he be, that taketh and dasheth thy little ones against the stones.
This is a partial list. Interestingly, there are many who cite Bible verses in support of the view that the Almighty is opposed to abortion. It is notable that there are far fewer verses opposed to abortion than there are specifically condoning the murder of infants. Also, the verses that supposedly oppose abortion require some creative interpretation, while the verses supporting the murder of children are quite explicit and do not require such a degree of creative interpretation.