Deuteronomy 13:3

And thou shalt remember all the way which the Lord thy God led thee these forty years in the wilderness, to humble thee, and to prove thee, to know what was in thine heart, whether thou wouldest keep his commandments, or no.

For there must be also heresies among you, that they which are approved may be made manifest among you.

For thou, O God, hast proved us: thou hast tried us, as silver is tried.

And thou shalt love the Lord thy God with all thine heart, and with all thy soul, and with all thy might.

Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.

And for this cause God shall send them strong delusion, that they should believe a lie:

To the law and to the testimony: if they speak not according to this word, it is because there is no light in them.

For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.

And deceiveth them that dwell on the earth by the means of those miracles which he had power to do in the sight of the beast; saying to them that dwell on the earth, that they should make an image to the beast, which had the wound by a sword, and did live.

They went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us.

Ye are of God, little children, and have overcome them: because greater is he that is in you, than he that is in the world.

I speak not by commandment, but by occasion of the forwardness of others, and to prove the sincerity of your love.

These were more noble than those in Thessalonica, in that they received the word with all readiness of mind, and searched the scriptures daily, whether those things were so.

Who fed thee in the wilderness with manna, which thy fathers knew not, that he might humble thee, and that he might prove thee, to do thee good at thy latter end;

That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive;

Thou calledst in trouble, and I delivered thee; I answered thee in the secret place of thunder: I proved thee at the waters of Meribah. Selah.