What animals were taken from the children of Israel for the Day of Atonement offerings?
From the children of Israel, the Day of Atonement offerings included two young goats—one for a sin offering—and a ram for a burnt offering. The high priest also offered a bullock, but that was for his own sin offering, not taken from the congregation.
Les explains that before Aaron could begin the Day of Atonement, he had to wash thoroughly, put on linen undergarments and holy garments. Then, as instructed in verse 5, he was to take from the congregation of the children of Israel two young goats—one for a sin offering—and a ram for a burnt offering. Additionally, Aaron offered his own bullock as a sin offering for himself and his house, because even the high priest was a sinner and needed atonement. This foreshadows Christ, who went in sinless.
And he shall take of the congregation of the children of Israel two kids of the goats for a sin offering, and one ram for a burnt offering.