Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa from Yunus ibn ‘Abd al- Rahman from ibn Bukayr from Hamza ibn Muhammad from abu ‘Abd Allah , the following:

“Once I asked the Imam , about the words of Allah, the Most Holy, the Most High, ‘Have We not shown him the ways of ‘al-Najdayn’ ?’ (90:10) The Imam said, ‘al-Najdayn’ means the ways of good and evil.’”