The First Jhāna Is Secure from Danger and Māra

So too, Monks, when, distant from sense-desires, distant from unwholesome mental states, enters and resides in the first Jhāna, which is with thinking and pondering, based in seclusion, filled with excitement and joy. On that occasion it occurs to the Monk: Now I am secure from danger and Māra cannot do anything to me. It also occurs to Māra the Evil One: Now the Monk is secure against danger and I cannot do anything to him.

(In reference to the second Jhāna ... the third Jhāna ... and the fourth Jhāna ... are explained in the same repetitive phrases.)

(Reference: AN 9.39)

In this Teaching from Gotama Buddha, he shares how once a Practitioner enters into the first Jhāna, they are no longer in danger from Māra the Evil One.

For details on Māra the Evil One, please see Chapter 13 of this book.