Translation:

75. The leaders of the arrogant party among his people said to those who were reckoned powerless those among them who believe: "know ye indeed that Saleh is an apostle from his Lord?" They said: "We do indeed believe in the revelation which hath been sent through him."

Notes (Tafseer)

1045. As usually happens in such cases, the Believers were the lowly and the humble, and the oppressors were the arrogant, who in selfishly keeping back nature's gifts (which are Allah's gifts) from the people, were deaf to the dictates of justice and kindness. Salih took the side of the unprivileged, and was therefore himself attacked.

1046. Notice the relation between the question and the answer. The godless chiefs wanted to discredit Salih, and put a personal question, as much as to say, "Is he not a liar?" The Believers took back the issue to the higher plane, as much as to say. "We know he is a man of Allah, but look at the justice for which he is making a stand: to resist it is to resist Allah". The answer of the godless was to reject Allah in words, and in action to commit a further act of cruelty and injustice in ham-stringing and killing the she-camel, at the same time hurling defiance at Salih and his God.