The sons of Maharaja Ghrtaprstha were named Ama, Madhuruha, Meghaprstha, Sudhama, Bhrajistha, Lohitarna and Vanaspati. In their island there are seven mountains, which indicate the boundaries of the seven tracts of land, and there are also seven rivers

Expressions researched:
"The sons of Maharaja Ghrtaprstha were named Ama, Madhuruha, Meghaprstha, Sudhama, Bhrajistha, Lohitarna and Vanaspati. In their island there are seven mountains, which indicate the boundaries of the seven tracts of land, and there are also seven rivers"

Srimad-Bhagavatam

SB Canto 5

The sons of Maharaja Ghrtaprstha were named Ama, Madhuruha, Meghaprstha, Sudhama, Bhrajistha, Lohitarna and Vanaspati. In their island there are seven mountains, which indicate the boundaries of the seven tracts of land, and there are also seven rivers.

SB 5.20.21, Translation

The sons of Mahārāja Ghṛtapṛṣṭha were named Āma, Madhuruha, Meghapṛṣṭha, Sudhāmā, Bhrājiṣṭha, Lohitārṇa and Vanaspati. In their island there are seven mountains, which indicate the boundaries of the seven tracts of land, and there are also seven rivers. The mountains are named Śukla, Vardhamāna, Bhojana, Upabarhiṇa, Nanda, Nandana and Sarvatobhadra. The rivers are named Abhayā, Amṛtaughā, Āryakā, Tīrthavatī, Rūpavatī, Pavitravatī and Śuklā.