Assalamu'alaykum,

Which recitation is it, when the qaari, in soorah an nasr, in the last sentence, reads innahoo kaana tawwa a ba  (with hamzah in the middle) instead of "innahoo kaana tawwaabaa (with mad asli)? 

In this link http://quran.islamway.com/saad/110.mp3 a sheikh reads in such a way. 

 JazakAllahu khairan.

Answer

Wa alaikum assalaam wa rahmatullahi wa barakatuh.

We listened to the link and found that the reciter changed the tone in his voice in the middle the last word with a little catch, which could be mistaken for a hamzah, but it is not one.  Masha’ Allah your ear is good at picking up little variances.

There is no way of recitation that puts a hamzah in the middle of the word . 

Wa assalaam