南系岩画大都以红色涂绘，颜料是以赤铁矿粉调合牛血等而成的。

Most of them are painted red with bloodstone powder and ox blood.

youdao

The lamb will then be eaten as a family meal, and its blood will be smeared on the doorposts to mark the house so the angel of death knows to pass over that house -handy and the pun works in Hebrew, as well as English, In addition, each family is to eat unleavened bread.

然后这家人把羊吃掉，然后把羊血涂在门柱上，作为标记,所以当死亡天使经过的时候便可以看到,这里有一个在希伯来语和英语中都能讲得通双关语，除此之外，每一家都要吃没有发酵的面包。

耶鲁公开课 - 旧约导论课程节选

Sacrifices that purge the sanctuary of ritual impurity, primarily the hatta't, always involve the manipulation of the animal's blood, daubing it on the altar and on Yom Kippur, actually entering the innermost shrine and sprinkling it on the throne of God and the footstool, the ark itself.

能够净化圣所中仪式上不洁的献祭，主要是hatta’t，经常包含着对动物血液的操纵,在赎罪日把血涂在祭坛上，进入最里面的神殿,把血洒在上帝的王座，以及他的脚凳，也就是方舟上。

耶鲁公开课 - 旧约导论课程节选