'Testing' in the Bible

Do not harden your hearts as [your fathers did] in the rebellion [of Israel at Meribah],On the day of testing in the wilderness,

By faith Abraham, when he was tested [that is, as the testing of his faith was still in progress], offered up Isaac, and he who had received the promises [of God] was ready to sacrifice his only son [of promise];

Because you have kept the word of My endurance [My command to persevere], I will keep you [safe] from the hour of trial, that hour which is about to come on the whole [inhabited] world, to test those who live on the earth.