The concept of the 'kalpa' as a cosmic cycle is found in the Brahmanas, which are a collection of ritual texts associated with the Vedas.

In Indian religious tradition, the number 108 is considered sacred and is often associated with spiritual practices such as japa (mantra repetition) and meditation. It is also the number of beads in a mala, a string of beads used for counting mantras.

Varahamihira, a 6th-century Indian astronomer and mathematician, is credited with developing the concept of the 'yugas', or cosmic ages, in his work 'Brihat Samhita'.

In Indian religious apocalyptic literature, the number 4 is significant because it represents the number of yugas, or cosmic ages, in a kalpa, or cosmic cycle.

The concept of the 'pralaya', or cosmic dissolution, is found in the Puranas, a collection of ancient Indian religious texts that contain myths, legends, and historical accounts.

In Indian religious apocalyptic literature, the number 7 is significant because it represents the number of rishis, or sages, who are believed to have received the Vedas from the gods.

Varahamihira, a 6th-century Indian astronomer and mathematician, is credited with developing the concept of the 'graha-yuddha', or planetary warfare, in his work 'Brihat Samhita'.

In Indian religious apocalyptic literature, the number 12 is significant because it represents the number of zodiac signs, which are used in astrology to predict the future.

The concept of the 'avatara', or divine incarnation, is found in the Bhagavad Gita, a sacred Hindu text that is part of the epic Mahabharata.

In Indian religious apocalyptic literature, the number 1008 is significant because it represents the number of names of Vishnu, one of the major Hindu deities.

Brahmagupta, a 7th-century Indian mathematician and astronomer, is credited with developing the concept of the 'chakravala' method for solving indeterminate equations.

In Indian religious apocalyptic literature, the number 27 is significant because it represents the number of nakshatras, or lunar mansions, which are used in astrology to predict the future.

The concept of the 'moksha', or liberation from the cycle of rebirth, is found in the Upanishads, a collection of ancient Indian philosophical texts.

In Indian religious apocalyptic literature, the number 360 is significant because it represents the number of degrees in a circle, which is used in astrology to predict the future.

Brahmagupta, a 7th-century Indian mathematician and astronomer, is credited with developing the concept of the 'Fibonacci sequence', a series of numbers in which each number is the sum of the two preceding ones.