Who would say this to man. god or satan?

Did you know that God said to Abraham "Kill me a son." Abe said, "Man, you must be puttin' me on." God said, "No." Abe say, "What?" God said, "You can do what you want, Abe, but next time you see me comin' you'd better run." Well, Abe said, "Where you want this killin' done?" God said, "Out on Highway 61."