'Experiment' in the Bible

"How was it," replied Peter, "that you two agreed to try an experiment upon the Spirit of the Lord? The men who have buried your husband are already at the door, and they will carry you out."

Now, therefore, why try an experiment upon God, by laying on the necks of these disciples a yoke which neither our forefathers nor we have been able to bear?

Whiles by the experiment of this ministration they glorify God for your professed subjection unto the gospel of Christ, and for your liberal distribution unto them, and unto all men;