أَنِّي مَغْلُوبٌ فَانتَصِرْ
Anni maghluubun fan-tasir. (54:10)
I have been overpowered so help me.
This was the du’aa of Sayyidnaa Nuh (a.s.) after 950 years of preaching to a stubborn people. This du’aa is also appropriate when a person feels overwhelmed by great hardships, calamities, serious illness, or enemies.
(Source: Khalid Baig’s commentary to du’aa #35 in the Accepted Whispers: Munajat-e-Maqbul)