1. Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa from Yunus ibn ‘Abd al-Rahman from ‘Abd Allah ibn Sinan who has narrated the following
“I once asked abu ‘Abd Allah (a.s.), about the kind of witnesses whose testimony is rejected. He (the Imam) said, ‘Of such people are a pessimist and an accused.’ I then asked, ‘What about a sinful and a treacherous one?’ He (the Imam) said, ‘Such ones are included in “pessimist”.”’