If a person is overcome by showing off during worship and then drives that showing off away, is his act invalidated?

Question:
He says, may Allah preserve you: If a person enters into worship with sincere intention for Allah, but during the worship he is overcome by showing off, and then he drives that showing off away, what is the ruling on that act? And is the entire act invalidated?

Answer:
Imam Ibn Rajab (may Allah have mercy on him) mentioned in his commentary on the Forty Hadiths a detailed explanation on this: if the showing off accompanies the act from its very beginning and continues with it until it ends, then it is invalid.
If the act was originally pure, and then showing off crept in, if he drives it away immediately, it does not harm him. If it continues with him until the act is completed, this is a point of disagreement among the scholars. Some say he is rewarded for the first part of the act, while others say he is not rewarded for it, neither for the beginning nor the end. The disagreement on this is mentioned in the commentary on the commentary of the Forty Hadiths, *Jami' al-'Ulum wa al-Hikam*. Yes.