Charles H. Spurgeon on Psalms 2:4

"He that sitteth in the heavens shall laugh at them: the Lord shall have them in derision." This tautology or repetition of the same thing, which is frequent in the Scriptures, is a sign of the thing being established: according to the authority of the patriarch Joseph (Genesis 41:32), where, having interpreted the dreams of Pharaoh, he said, "and for that the dream was doubled unto Pharaoh twice; it is because the thing is established by God, and God will shortly bring it to pass." And therefore, here also, "shall laugh at them," and "shall have them in derision," is a repetition to show that there is not a doubt to be entertained that all these things will most surely come to pass. And the gracious Spirit does all this for our comfort and consolation, that we may not faint under temptation, but lift up our heads with the most certain hope; because, "he that shall come will come, and will not tarry." Hebrews 10:37. Martin Luther.