O Mankind! Eat the lawful and good things out of what is in the earth and do not follow the footsteps of Shaitan , surely he is your open enemy.

Meaning :-                                                                                                                                                                      Shaitan:  the one who challenged God and vowed to lead mankind astray, an evil spirit,

Simplified Breakdown :-  O Mankind! Eat only good and lawful things from the earth and avoid following the footsteps of Shaitan, who is certainly your enemy.