Bukhari

Ibn Abbas (may Allah be pleased with them both) said that by «وكذب بالحسنى‏» it is meant that he does not have certainty that whatever he spends in the way of Allah, Allah will give him its reward. And Mujahid said regarding «اذا تردى‏» "when he dies." «تلظى‏» means the blazing, fiercely flaming fire of Hell. And Ubaid bin Umair recited «تتلظى‏» with two (ta’s).

Narrated Alqama: I went to Sham with a group of the companions of `Abdullah (bin Mas`ud). Abu Ad-Darda' heard of our arrival so he came to us and said, "Is there anybody among you who can recite (Qur'an)" We replied in the affirmative. Then he asked, "Who is the best reciter?" They pointed at me. Then he told me to recite, so I recited the verse:-- 'By the night as it envelops 'By the day as it appears in brightness; By (Him Who created) male and the female.' (92.1-3) Abu Ad-Darda' then said to me, "Did you hear it (like this) from the mouth of your friend (`Abdullah bin Mas`ud)?" I said, "Yes." He said, "I too, heard it (like this) from the mouth of the Prophet, but these people do not consider this recitation as the correct one."