RIG VEDA
Rigveda is the oldest known Vedic Sanskrit book. The earliest source of Sanatan Dharma. There are 10 mandalas, 1028 Suktas and currently, there are 10,462 mantras.
RIG VEDA SAMHITA:
You can download the following PDF file of the original Sanskrit text:
( PDF File Size: 10 MB)
Full Book in Sanskrit Devnagari Lipi
Rigveda Translations in Hindi
YAJUR VEDA
(Original Source: Sansknet.org)