Yahoo

Appeal in the form "يَا أَيُّهَا - ya-ayyuha!" - public address to someone.

In English «Yahoo!» or «Yoohoo!».

In Russian «Э-ге-ге!» or «Эгей!».

The song «Hey Ya!» of American hip hop duo Outkast, available for viewing on youtube - «Hey Ya!».

In the Quran

(2:21) O people, serve your Lord who has created you and those before you that you may (show) responsibility.

(4:47) O you who have received the book, acknowledge what We have sent down ahauthenticating what is with you, before We cast down faces and turn them on their backs or curse them as the people of the Sabbath were cursed. God's will is always done.

(3:102) O you who acknowledge, be aware of God as He deserves awareness, and do not die except as ones who have peacefully surrendered.

(33:45) O Prophet, We have sent you as a witness, and a bearer of good news, and a warner.

(15:57) He said, "What then is your business here, O messengers?"

(47:33) O you who trust! Obey God, and obey The Messenger. Do not render your work in vain.