Narrated Jabir bin `Abdullah:
Allah’s Messenger (ﷺ) said, “Whoever after listening to the Adhan says, ‘Allahumma Rabba hadhihi-dda` watit-tammah, was-salatil qa’imah, ati Muhammadan al-wasilata wal-fadilah, wa b`ath-hu maqaman mahmudan-il-ladhi wa`adtahu’ [O Allah! Lord of this perfect call (perfect by not ascribing partners to You) and of the regular prayer which is going to be established, give Muhammad the right of intercession and illustriousness, and resurrect him to the best and the highest place in Paradise that You promised him (of)], then my intercession for him will be allowed on the Day of Resurrection”.
The Dua in Arabic is:
اللَّهُمَّ رَبَّ هَذِهِ الدَّعْوَةِ التَّامَّةِ وَالصَّلاَةِ الْقَائِمَةِ آتِ مُحَمَّدًا الْوَسِيلَةَ وَالْفَضِيلَةَ وَابْعَثْهُ مَقَامًا مَحْمُودًا الَّذِي وَعَدْتَهُ، حَلَّتْ لَهُ شَفَاعَتِي يَوْمَ الْقِيَامَةِ
Shaykh Al Bassam mentioned in Tawdeehul Ahkaam Volume 1 Page 622 
That the following additions to this dua are weak and not authentic 
 1. اللهم اني اسالك بحق هذه الدعوة
2. و الدرجة الرفيعة
3. انك لا تخلف الميعاد 
4. يا ارحم الراحمين 
Majid Jawed Al Afghaanee