The ब्रह्मिन्स् residing in the island of शाक are generally called मगस् . The ब्रह्मपर्व of भविष्य पुराण and the साम्ब पुराण speak about the मगस् thus:

साम्ब , son of कृष्ण , did severe penance to please सूर्यदेव and pleased with the unwavering devotion of साम्ब , सूर्य gave him a luminous replica of himself for worship. साम्ब constructed a beautiful temple by the side of the चन्द्रभागा river and installed the idol there. He then brought from शाकद्वीप the ब्रह्मिन्स् called मगस् for conducting the ceremonies of the temple. All the eighteen families of मग ब्रह्मिन्स् came and stayed near the temple at the request of साम्ब .