Reference : Hisn al-Muslim 56

اللّهُـمَّ إِنِّـي أَعـوذُ بِكَ مِـنْ عَذابِ القَـبْر ،
وَأَعـوذُ بِكَ مِـنْ فِتْـنَةِ المَسيحِ الدَّجّـال ، 
أَعـوذُ بِكَ مِـنْ فِتْـنَةِ المَحْـيا وَالمَمـات . 
اللّهُـمَّ إِنِّـي أَعـوذُ بِكَ مِنَ المَأْثَـمِ وَالمَغْـرَم
Allāhumma 'innī ‘a`ūdhu bika min `adhābi ‘l-qabr, 
wa ‘a`ūdhu bika min fitnati ‘l-masīḥid-dajjāl, 
wa ‘a`ūdhu bika min fitnati ‘l-maḥyā wa ‘l-mamāt. 
Allāhumma ‘innī ‘a`ūdhu bika mina ‘l-m’athami wa ‘l-maghram.


O Allah, I seek refuge in You from the punishment of the grave,
and I seek refuge in You from the trial of the False Messiah, 
and I seek refuge in You from the trials of life and death. 
O Allah, I seek refuge in You from sin and from debt.

Reference:
Al-Bukhari 1/202, Muslim 1/412.

Chapter: After the last tashahhud and before salam