The song in 2 Samuel 1:19-27, as translated by Robert Alter, mourns the deaths of Saul and Jonathan, who were beloved leaders of Israel. The lyrics express sorrow over their deaths and the defeat of their army. The song warns against spreading the news of their defeat to the enemies, as it would bring them joy. The singers lament the loss of Saul and Jonathan, praising them as mighty warriors and leaders. The song emphasizes the deep bond between Saul and Jonathan, and expresses deep grief over their deaths. Overall, the song is a lament for the fallen warriors and a tribute to the greatness of Saul and Jonathan.