At a very early time, the spiritual and cultural unity of India was made complete, forming the very stuff of life of the great surge of humanity between the Himalayas and the two seas (as described by Sri Aurobindo).
The Ṛig Veda, India's most ancient text (several thousand years old), refers to the northwest region of the Subcontinent as Sapta Sindhava, meaning the 'land of the seven rivers'. This is derived from Sindhu, referring to the Indus River.
The Mahābhārata uses two primary terms to describe the entire Subcontinent:
Ancient texts show a clear geographical awareness of the subcontinent:
The Indian Constitution (which came into force in 1950) explicitly uses both names right at the beginning: 'India, that is Bharat' in English, and 'Bhārat arthāth India' in Hindi.
Ancient Chinese texts referred to India using terms derived from 'Sindhu':
The term Hindustān was first used in a Persian inscription about 1,800 years ago. It later became the common term used by most invaders to describe the Indian Subcontinent.