Please explain me how to read Surah Nahl ayah 30, without stopping at khairan;

Question
Assalaamu alaikum.  Please explain me how to read Surah Nahl ayah 30 , without stopping at khairan; . Will it  be idgham or izhar here. please explain it in detail.
Jazakall Khair

Answer
Wa alaikum assalaam wa rahmatullahi wa barakatuh.
When we read this phrase in continuum, we have the noon saakinah of the tanween in the word  followed by a: .  When we have a noon saakinah or tanween followed by a voweled , the rule is idghaam with no ghunnah.  In this case, the noon saakinah of the tanween completely merges into the and the then becomes emphasized meaning it acquires a shaddah.  That is why there is a shaddah on the of the first letter of the word following .  This shaddah is only read when joining the two words together. 
If we stop on and then start on the word , we read the first with a kasrah only, no shaddah.