首楞嚴義疏注經 5.346

5.346

烏芻瑟摩，此云火頭。因多貪欲，聞教修觀，從此獲悟。貪欲盛者是鬼獄因，因為欲火所熾，果為業火所燒，因果相當俱名火聚。

Ucchuṣma is translated here as 'Fire-Head'. Because of his abundant lustful desire, he heard the teaching and cultivated contemplation, from which he attained awakening. Those whose lustful desire flourishes are the cause of ghosts and hells: because the cause is blazed by the fire of desire, the fruit is scorched by the fire of karma; cause and fruit matching, both are called a 'mass of fire'.