The Prose Edda 1.22

Then said Gangleri: "I would ask tidings of more Æsir." Hárr replied: "The second son of Odin is Baldr, and good things are to be said of him. He is best, and all praise him; he is so fair of feature, and so bright, that light shines from him. A certain herb is so white that it is likened to Baldr's brow; of all grasses it is whitest, and by it thou mayest judge his fairness, both in hair and in body. He is the wisest of the Æsir, and the fairest-spoken and most gracious; and that quality attends him, that none may gainsay his judgments. He dwells in the place called Breidablik, which is in heaven; in that place may nothing unclean be, even as is said here:

Breidablik 't is called, where Baldr has A hall made for himself: In that land where I know lie Fewest baneful runes.