Musannaf Ibn Abi Shaybah

Hazrat Abdullah bin Umar (may Allah be pleased with them both) narrates that whenever the Noble Prophet (peace and blessings be upon him) returned from any military expedition, or from any detachment, or from Hajj or Umrah, the narrator says, whenever he reached a mountain pass or a plain, he would say Takbeer three times, then recite these words: There is no deity except Allah, He is alone, He fulfilled His promise, we are those who return, those who repent, those who worship, those who praise our Lord.