The Poets - 26:188 "He said, "My Lord knows very well what you do."
The people of the prophet Shu'ayb, the people of Aykali/Median, were a corrupt people, associating partners and committing injustice in measuring and weighing.
The Heights/7:85 "And We sent to Median their brother Shu´ayb. He said: "O My people, worship Allah. You have no gods besides Him. A clear proof has come to you from your Lord. Measure and weigh exactly. Do not eat the people´s right. Do not make corruption in the earth after it has been leveled. This is better for you if you believe."
The Heights/7:86 Do not sit at the head of every path to pervert the way of Allah and to threaten the believers and turn them away from it. Think how He multiplied you when you were few in number. See how is the end of the corrupters.
The Heights/7:88 "The arrogant elders of his people said: "Shu´ayb, either we will expel you and those who believe with you from our city or you will return to our religion."He said: "Even if we do not want to?"

Prophet Hud/11:84 "And to Median We sent their brother Shu´ayb. He said: "O my people, serve Allah, you have no god but Him. Do not keep the measure and the weighing deficient. I see you in prosperity and I fear for you the torment of an encompassing Day."
Prophet Hud/11:85 O my people, measure and weigh exactly with justice. Do not shortchange the people and do not commit evil by corrupting the earth.

The Poets/26:177 "Their brother Shuaib said to them, "Will you not be righteous?"
The Poets/26:180 And I do not ask any wage from you for this; my wage belongs only to the Lord of the Universes.
The Poets/26:181 Measure exactly. Do not be of those who deceive.
The Poets/26:182 Weigh with the right scale.
The Poets/26:183 And do not withhold from the people their due and do not create confusion in the earth by committing evil.
The Poets/26:184 And honor Him who created you and the previous generations.

The Spider/29:36 "And to Median We sent their brother Shu´ayb. He said: "My people, serve Allah and seek the Last Day and do not make mischief in the earth."