Which Mikhail Lermontov poem responded to Aleksandr Pushkin’s fatal duel?

Following the fatal duel of Aleksandr Pushkin in 1837, Mikhail Lermontov wrote the elegy titled "Smert poeta" ("Death of a Poet").12

This poem brought Lermontov immediate fame, as it expressed the nation's grief while boldly denouncing both the poet's killer and the court aristocracy, whom Lermontov held responsible for the tragedy. Due to the poem's critical stance against the court, Lermontov was arrested and exiled to the Caucasus.12