Exodus 12:50

Thus did all the children of Israel
They slew a lamb, and roasted and ate it, with unleavened bread, and bitter herbs, and took a bunch of hyssop, and dipped it in the blood, and struck the lintel and the side posts of the doors of their houses: this they did on the night of their deliverance out of Egypt: as the Lord commanded Moses and Aaron, so did they;
being instructed by them; which is an instance of their ready and cheerful obedience to the divine will, which they were under great obligation to perform, from a grateful sense of the wonderful mercy and favour they now were made partakers of.