Then God sent down 'By the star when it sets your comrade errs not and is not deceived, he speaks not from his own desire',
and when he reached His words,

'Have you thought of al-Lat and al-'Uzza and Manat the third, the other',
Satan, when he was meditating upon it, and desiring to bring it (sc. reconciliation) to his people, put upon his tongue

'these are the exalted Gharaniq¹ whose intercession is to him approved.'

When the Quraysh heard that they were delighted and greatly pleased at the way in which he spoke about their gods and they listened to him;
while the believers were holding that what their prophet brought them from the ir Lord was true, not suspecting a mistake or a vain desire or a slip, and when he reached the prostration and the end of the Sura in which he prostrated himself the Muslims prostrated themselves when their prophet prostrated confirming what he had brought and obeying his command, and the polytheists of Quraysh and others who were in the mosque prostrated when they heard the mention of their gods, so that everyone in the mosque believer and unbeliever prostrated, except al-Walid b. al-Mughira who was an old man who could not do so, so he took a handful of dirt from the valley and bent over it.
Then people dispersed and Quraysh went out, delight at what had been said about their gods saying,
'Muhammad has spoken of our gods in splendid fashion.
He alleged in what he read that they are exalted Gharaniq whose intercession is approved.'

The news reached the prophet's companions who were in Abyssinia, it being reported that Quraysh had accepted Islam, so some men started to return while others remained behind.

Then Gabriel came to the apostle and said,
'What have you done, Muhammad?
You have read to these people something I did not bring you from God and you have said what He did not say to you.'

1 The word is said to mean 'Numidian cranes' which fly at a great height.

p.165-166, Ibn Ishaq's Sirat ar-Rasul, translated by Alfred Guillaume, published OUP Pakistan.

Some explanation of the background from 'Answering Islam' 

Front page of At-Tabaqat Al-Kubra by Mohamed Ibn Sa'd
Page 139
Page 140
Also available on line at:
This link (with thanks to Jobanx of FFI for his helpful suggestions)
(Scroll down till you reach subtitle 'cause of return of companions') 

Title page of Comments on Sura An-Nagm by Imam Tabari
First page
 Second page
Third page
Fourth page 

Some relevant comments by Bukhari