Dua after sunnats of Fajr

(Thrice)
اللَّهُمَّ رَبِّ جِبْرِيلَ وَمِيكَائِيلَ وَإِسْرَافِيلَ وَمُحَمَّدٍ صَلَّى اللهُ علَيْهِ وَسَلَّمَ، أَعُوذُ بِكَ مِنَ النَّارِ
O Allâh, Sustainer of Jibrâîl, Mikâîl, Isrâfîl and Nabi Muhammed (Sallallahu alayhi wasallam), I seek Your protection from the Fire.
(Mustadrak of Hakim, Amalul Yaum of Ibn Sunni)