Dua in prostration — seeking forgiveness and Paradise
اللّهُـمَّ اغْفِـرْ لي ذَنْبـي كُلَّـه، دِقَّـهُ...
اللّهُـمَّ اغْفِـرْ لي ذَنْبـي كُلَّـه، دِقَّـهُ وَجِلَّـه، وَأَوَّلَـهُ وَآخِـرَه، وَعَلانِيَتَـهُ وَسِـرَّه
Allahummagh-fir lee thanbee kullahu, diqqahu wajillah, wa-awwalahu wa-akhirah, waAAalaniyatahu wasirrah
Translation
O Allah, forgive me all of my sins, the minor and the major, the first and the last, the open and the secret.
When to recite
Recited during prostration in prayer.
Source / Reference
Muslim 1/350