The firstborn of the human family, Cain, killed his brother Abel because “his own works were wicked, but those of his brother were righteous. ”
( ઉત્પત્તિ ૪: ૩ - ૧૨) કાઈન શેતાનના માર્ગમાં ચાલ્યો હોવાથી તે દુષ્ટ હતો.