Saleh or Șāliḥ (Arabic: صالح‎; meaning Pious) was an Arabic prophet of ancient Arabia mentioned in the Qur'an, who prophesied to the tribe of Thamud. He is mentioned nine times throughout the Qur'an and his people are frequently referenced as a wicked community who, because of their sins, were ultimately destroyed. Saleh is sometimes equated with the Shelah of the Hebrew Bible, however there is almost nothing in common between the Qur'anic narrative of Saleh and the Biblical narrative of Shelah. The preaching and prophecy of Saleh is linked to the famous Islamic story of the She-Camel, which was the gift given by God to the people of Thamud when they desired a miracle to confirm the truth of the message Saleh was preaching. Chronologically, scholars believe Saleh's prophesying to have been post-Antediluvian^{[clarification needed]} but pre-Abrahamic.

Thamud people are believed to have been the successors to the ancient tribe of ʿĀd. Their ancestral descendant may have been Eber, the great-grandson of Noah and their location is likely to have been in the Northwest corner of Arabia, between Madinah and Syria. In later Islamic history, when Muhammad led his expedition to Tabuk against the Romans, on a reported Roman invasion from Syria, the prophet - and his companions - came across the remains of Thamud. With the advance of material civilization, the people of Thamud became materialistic and arrogant as well as godless. Thus, God sent the prophet and seer Saleh, to warn them about the impending doom they would face if they did not mend their sinful ways.

General Salim Saleh (born Caleb Akandwanaho, 14 January 1960), is an adviser to the President of Uganda on military matters. Formerly, he was the Ugandan Minister of State for Microfinance. Before that, he was a high ranking military official of UPDF, the armed forces of Uganda. He is a brother of the current President of Uganda, Yoweri Museveni. Salim Saleh has featured in controversies regarding corruption, including being implicated by the UN Security Council for plundering natural resources in Congo (DRC).

In 1976, aged 16, he left Kako Secondary School in Masaka to join the Front for National Salvation (FRONASA), a Tanzania-based rebel group formed and led by his brother Yoweri Museveni to fight against the regime of Idi Amin. Together with his friend Fred Rwigyema and his brother Museveni, he trained in Mozambique with Samora Machel's FRELIMO rebels. It was there that he adopted Salim Saleh as his nom de guerre. In 1978, FRONASA merged with other anti-Amin groups in Tanzania and formed the Uganda National Liberation Army (UNLA), who together with Tanzanian armed forces captured Kampala in April 1979 – sending Idi Amin to exile. Saleh was later made a platoon commander of a UNLA unit in Moroto District. Following the bitterly contested December 1980 elections, Museveni declared an armed rebellion against the UNLA and the government of Milton Obote.