100/1000/...Names of God : Source

100/1000/...Names of God : Source
Earliest One is perhaps the SatarudrÉya the enumeration of the ‘hundred names of Rudra’ in Yajurveda( VS XVII).

This practice will develop in later religious texts into the 1000 names of Shiva and the 1000 names of Vishnu. (in Mahabarata and Purans)

Their recitation was (is still) considered a highly meritorious act of worship.

Chanting the names of God is a vedic practise including the recitation of OM.

we find some sacrificial invocations like svÄhÄ ‘hail!’ and vaêaç
‘hail/amen’. Here is found also the sacred syllable OM which in the language of the gods signifies what is denoted by tathÄ ‘thus, so it may be’ among men (AB VII, 18) or which expresses consent‘yes, so be it, amen’ (CU I, 1, 8).