Marcos 9

Después, cuando Jesús estaba en casa, sus discípulos le preguntaron en privado: “¿Por qué nosotros no pudimos sacar al espíritu?”

Y como él entró en casa, sus discípulos le preguntaron aparte: ¿Por qué nosotros no pudimos echarle fuera?

And when he was come into the house, his disciples asked him privately, Why could not we cast him out?

When he had come into the house, his disciples asked him privately, “Why couldn’t we cast it out?”