Mukhtasar Muslim

Narrated Abdullah bin Umar (may Allah be pleased with them) that the Messenger of Allah (peace and blessings of Allah be upon him), when he would return from armies or from a small group of armies or from Hajj or Umrah, whenever he reached a hill or elevated stony ground, he would say "Allahu Akbar" three times, then he would say: "There is no one worthy of worship except Allah alone, He has no partner, His is the dominion and to Him belongs all praise, and He has power over all things. We are returning, repenting, worshipping, prostrating, and praising our Lord specially. Allah has fulfilled His promise, helped His servant, and He alone defeated the armies (of the disbelievers)."