This same principle was followed in the Battle of Kuruksetra (promising before God). Therefore in the very beginning of the Bhagavad-gita it is stated: dharma-ksetre kuru-ksetre - BG 1.1: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.