Translation of the verse 45 from Surah An-Naml : Number of verses 93 - - page 381 - Part 19.
And indeed We sent to Thamud their brother Salih (Saleh), saying: "Worship Allah (Alone and none else). Then look! They became two parties (believers and disbelievers) quarreling with each other."
And We had certainly sent to Thamud their brother Salih, [saying], "Worship Allah," and at once they were two parties conflicting.
(27:45) And *57 to Thamud We sent their brother Salih (with the message)that they should worship Allah, but they divided themselves forthwith into two wrangling groups. *58
*57) For comparison. see Al-A'raf: 73-79, Hud: 61-68, Ash-Shu'ara': 141159, AI-Qamar: 23-32, Ash-Shams: 11-15.
*58) That is, as soon as the Prophet Salih embarked on his mission, his people were divined into two groups, the believers and the disbelievers, and a conflict started between them as stated elsewhere in the Qur'an: "The chiefs of his tribe, who .were full of pride, said to those who had believed from among the oppressed people, 'Do you know it for certain that Salih is a Messenger from his Lord?' They replied, `Indeed, we believe in the message with which he has been sent.' But those who had arrogant assumption of superiority, said, `We deny that which you believe'." (Al-A'raf: 75-76). One should note that precisely the same situation arose in Makkah at the advent of the Holy Prophet Muhammad (may Allah's peace be upon him). The nation was divided into two factions and a conflict started between them. Therefore, this story fully applied to the conditions in which these verses were revealed.