Vimalaprabhasa

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Vimalaprabhā (विमलप्रभा) refers to the commentary on the Kālacakratantra, the famous Tantra of the Buddhists which introduces the cult of Kālacakra into Buddhism.—Vimalaprabhā is the commentary on the Kālacakratantra which is referred to in the Niṣpannayogāvalī. It is thus probable that the cult of Kālacakra came into vogue in the 10th century. According to the Kālacakratantra, the cult was given the name of Ādibuddhayāna or Ādiyāna. From the Vimalaprabhā it is evident that by introducing the worship of Kālacakra, the circle of time, an attempt was made to bring the warring communities of the Hindus and the Buddhists under the same banner, and unite them against the cultural penetration of the Mlecchas from the Western borders of India where the followers of Islam were daily growing strong and were destroying old and ancient civilizations.

Source: Brill: Śaivism and the Tantric Traditions (tantric Buddhism)

Vimalaprabhā (विमलप्रभा) is an eleventh-century commentary on the Kālacakratantra.—The Vimalaprabhā explains the term haṭhayoga as the name of a type of yoga that forces prāṇa (‘vitality’) into the central channel through a practice involving nāda (‘internal resonance’) and retention of bindu (‘generative fluids’).

Vimalaprabha (विमलप्रभ, “pure light”) refers to one of the “four concentrations” (samādhi) as defined in the Dharma-saṃgraha (section 136). The Dharma-samgraha (Dharmasangraha) is an extensive glossary of Buddhist technical terms in Sanskrit (e.g., vimala-prabha). The work is attributed to Nagarjuna who lived around the 2nd century A.D

Vimalaprabha (विमलप्रभ).—(1) name of a former Buddha: Sukhāvatīvyūha 5.11;

(2) name of a Bodhisattva: Gaṇḍavyūha 3.15;

(3) name of a śuddhā- vāsakāyika god: Lalitavistara 267.9;

(4) name of two samādhis, in the same list: Mahāvyutpatti 544 = Śatasāhasrikā-prajñāpāramitā 1418.9, and Mahāvyutpatti 609 = Śatasāhasrikā-prajñāpāramitā 1425.2; also one of (only) four samādhis, Dharmasaṃgraha 136; (5) name of a former kalpa: Gaṇḍavyūha 174.21; of another, also called Vimalābha, q.v., Gaṇḍavyūha 307.9 (prose).