The Messenger of Allah (sal Allahu alaihi wa sallam) said: “The slave will meet his Lord, and Allah will say, ‘Did I not honour you and make you a leader and give you a spouse, and subjugate horses and camels for your use, and let you become a leader?’ He will say, ‘Yes indeed, O Lord.’ Allah will say, ‘Did you think that you would meet Me?’ He will say, ‘No.’ (Allah) will say, ‘I will forget you as you forgot Me.’ Then a second slave will meet Him, and He will say something similar to Him. Then a third slave will meet Him, and He will say something similar, but he (the third slave) will say, ‘I believed in You and in Your Book and Your Messenger. I prayed, fasted and gave in charity.’ He will praise himself as much as he can. Then (Allah) will say, ‘Shall We not send Our witness against you?’ and he will wonder who that witness could be. Then a seal will be placed over his mouth, and it will be said to his thigh, ‘Speak!’ So his thigh will speak, as will his mouth and his bones, of what he used to do, and thus he will be left with no excuse. That is the Munaafiq (hypocrite), and that is the one with whom Allah will be angry.” [Muslim]
Because the hypocrite was prone to lying and concealing his true animosity to Islam and Muslims in the world, he will attempt to lie his way though the Day of Judgement as well. He lied in life, pretending to be a Muslim, and will again attempt to lie on the Day of Judgement. A hypocrite’s God is not Allah but benefit. On the Day of Judgement however, although he will attempt to lie and claim to have been righteous, his own body will testify against him.
The debate that will take place between a person and his limbs and faculties is a strange and wondrous matter testified to in the Quran as well.
“Their hearing (ears) and their eyes and their skins will testify against them as to what they used to do. And they will say to their skins, ‘Why do you testify against us?’ They will say, ‘Allah has caused us to speak.’ He causes all things to speak, and He created you the first time, and to Him you are made to return.” [Quran: Surah Fussilat, Ayaat 20-21]