A--- There are many Hadiths pertaining to this, foremost among which are:

Whenever' A'ishah (the wife of the Prophet (Peace be upon him» heard anything which she did not understand, she used to ask again till she understood it completely. `A'ishah said: "Once the Prophet said:

"Whoever will be called to account (about his deeds on the Day of Resurrection) will surely be punished.” I said: "Doesn't Allah say: {He surely will receive an easy reckoning}." (Al-Inshiqaq, 8) The Prophet (Peace be upon him) replied, "This means only the presentation and display of one's account but whoever will be argued about his account, will certainly be ruined." (Bukhari and Muslim)

Narrated Anas (May Allah be pleased with him): The Prophet (Peace be upon him) says: "Allah will say to that person of the (Hell) Fire who will receive the least punishment, 'If you had everything on the earth, would you give it as a ransom to free yourself (i.e. save yourself from this Fire)?' He will say, 'Yes.’ Then Allah will say, 'While you were in the backbone of Adam, I asked you much less than this, i.e. not to worship others besides Me, but you insisted on worshipping others besides me.” (Bukhari and Muslim)

Narrated' Adi Ibn Hatim (May Allah be pleased with him): Allah's Messenger (Peace be upon him) says: "There will be none among you but his Lord will talk to him, and there will be no interpreter between him and Allah. He will look to his right and see nothing but his deeds which he has sent forward, and will look to his left and see nothing but his deeds which he has sent forward, and will look in front of him and see nothing but the (Hell) Fire facing him. So save yourself from the (Hell) Fire even with half a date (given in charity)." Al-A 'mash said: 'Amr Ibn Murrah said:

Khaithamah narrated the same and added, ‘…even with a good word. '" (Bukhari and Muslim)

Narrated Safwan Ibn Muhriz (May Allah be pleased with him): A man asked Ibn 'Umar, "What have you heard from Allah's Messenger regarding An-Najwa?" He said: "Everyone of you will come close to His Lord Who will screen him from the people and say to him, 'Did you do so-and-so?' He will reply, 'Yes.' Then Allah will say, 'Did you do so-and-so?' He !yill reply, 'Yes.' So Allah will question him and make him confess, and then Allah will say, 'I screened your sins in the world and forgive them for you today.’” (Bukhari and Muslim)