Purifying the place of the thought before it occurs by preparing for it while knowing what comes to him in terms of the revelation that it is. If it is interrupted by its presence and it is necessary, it is not permissible for it is due to the first purity, and if it occurs, it is necessary to purify it because it occurs without a doubt, so things do not exceed their times. The ruling is for the time, and whoever gives it before the time has violated the ruling for the time.