Sunan Abi Dawud Book 2, Hadith 138
Bilal began the Iqamah, and when he said: "The time for prayer has come," the Prophet (ﷺ) said: "May Allah establish it and cause it to continue."
“Allah is most great, Allah is most great”, and one of you says in response: “Allah is most great”, Allah is most great; then says: “ I testify tht there is no god but Allah”, and he says in response: “I testify that there is no god but Allah”, then say:” I testify that Muhammad is the Messenger of Allah”, and he makes the response: “ I testify that Muhammad is the Messenger of Allah”, then says: “Come to prayer”, and he makes the response: “There is no might and no power except in Allah”: then says: “ Allah is most great, Allah is most great”, and he makes the response: “Allah is most great”, then says: “There is no god but Allah”, if he says this from his heart, he enter Paradise.
if anyone says when he hears the call to prayer : “O Allah, Lord of this perfect call and of the prayer which is established for all time, grant Muhammad the wasilah and excellency, and raise him up in a praiseworthy position which Thou hast promised, he will be assured of my intercession.