The demon Balam appears in the grimoires Book of Incantations, The Sixth and Seventh Books of Moses, The Discoverie of Witchcraft, Pseudomonarchia Daemonum, The Lesser Key of Solomon, and Dictionnaire Infernal
From The Lesser Key of Solomon, Crowley/Mathers edition:
Balam
The Fifty-First Spirit is Balam or Balaam. He is a Terrible, Great, and Powerful King. He appeareth with three Heads: the first is like that of a Bull; the second is like that of a Man; the third is like that of a Ram. He hath the Tail of a Serpent, and Flaming Eyes. He rideth upon a furious Bear, and carrieth a Goshawk upon his Fist. He speaketh with a hoarse Voice, giving True Answers of Things Past, Present, and to Come. He maketh men to go Invisible, and also to be Witty. He governeth 40 Legions of Spirits. His Seal is this, etc.
Timeline of related events
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Publication of Dictionnaire Infernal (lists this demon)