An-Nisaa (The Women)

63. "Those are they of whom Allah knows what is in their hearts, therefore turn away from them, and admonish them and speak to them concerning themselves effectual words."

The effort of the hypocrites is useless, because Allah knows both their interiors and their evil intentions, and manifests them at an appropriate time.

"Those are they of whom Allah knows what is in their hearts ..."

Also, the apology of the hypocrites is not done truthfully; otherwise they would not issue the command of rejection.

"... Allah knows what is in their hearts, therefore turn away from them ..."