'Hour of Trial' in the Bible

And he went on a little way and threw himself on the ground and prayed that if it were possible he might be spared the hour of trial,

Those 'on the rock' are people who on hearing the word welcome it with enthusiasm, but they have no root; they believe for a while and fall away in the hour of trial.

Because thou didst keep the word of my patience, I also will keep thee from the hour of trial, that hour which is to come upon the whole world, to try them that dwell upon the earth.