In plain words
The poet, singing Rāma of Kaṇṇapuram to sleep: O you who, that day [of the deluge], swallowed the worlds and lay as an infant on a banyan leaf! O you who killed Vāli and gave the kingdom to the younger monkey [Sugrīva]! My dark gem of Kaṇṇapuram, where the wind washes gems up on the shore! Lord of the city of Āli, king of Ayōdhyā, tālēlō.