verse 16:63 , why Allah himself says 'By Allah' in it ?

[Adil Husain]

16:63 (Sahih international translation)
"By Allah , We did certainly send [messengers] to nations before you, but Satan made their deeds attractive to them. And he is the disbelievers' ally today [as well], and they will have a painful punishment.

Please will you explain me why Allah used the words 'By Allah' himself in 16:63 ? Looks strange.

[optimist]

16:63 (Sahih international translation)
"By Allah , We did certainly send [messengers] to nations before you, but Satan made their deeds attractive to them. And he is the disbelievers' ally today [as well], and they will have a painful punishment.

Please will you explain me why Allah used the words 'By Allah' himself in 16:63 ? Looks strange.

I don't think it looks strange....the verse is specifically addressed to the prophet  (though the message is for all) and prophet is directly in touch with Allah through wahi  and in order to confirm the fact of the message Allah swears by Himself....to stress the point that no one should have any doubt about what is being stated.

[Joseph Islam]

Peace Adil,

With respect, I once again differ with Optimist's somewhat simplistic response. This goes to the heart of the Quranic style of communication and 'how and whose speech' is captured by the Quran. There is also much scholarship material on this topic which is insightful reading both from a Muslim and a non-Muslim perspective.

If for example you read verses 37:164-166 you will know exactly what I mean. Who is the 'speaker'? God, or the revelatory angels?

My general response to this can be seen in the short Q&A article below:

WHY DOES THE QURAN SOMETIMES USE THE PLURAL?
http://quransmessage.com/articles/plural%20FM3.htm

Regards,
Joseph.

[Adil Husain]

Salaam alaikum , Thanks Joseph islam and optimist for giving your time to reply on my post.

I understood it sir. 16:63 is words of angel , the angel says 'By Allah' , we (angels and god , on the command of god alone) sent to the nations before you .
Sahih international uses the word messenger in brackets to explain it , but now after viewing your explanation  i think 'warning or good news' makes more sense here.knowing arabic grammer , what are your views on it sir .
Thank you.