سورة الزمر

Imam Ali (peace be upon him): فَمَنْ أَظْلَمُ مِمَّن کَذَبَ عَلَی اللهِ وَکَذَّبَ بِالصِّدْقِ إِذْ جَاءهُ [Who then is more unjust than he who utters a lie against Allah and gives the lie to the truth when it comes to him]; the truthful word is the wilayah of us, the Ahl al-Bayt (peace be upon them).

Imam Sadiq (peace be upon him): Imam Kazim (peace be upon him) narrated from his father that concerning the verse فَمَنْ أَظْلَمُ مِمَّنْ کَذَبَ عَلَی اللهِ وَ کَذَّبَ بِالصِّدْقِ إِذْ جاءَهُ [Who then is more unjust than he who utters a lie against Allah and gives the lie to the truth when it comes to him] he said: "That wrongdoer is the one who has rejected the command of the Messenger of Allah (peace be upon him and his family) regarding the acceptance of the wilayah of the Commander of the Faithful (peace be upon him)."

Ali ibn Ibrahim (may Allah have mercy on him): فَمَنْ أَظْلَمُ مِمَّن کَذَبَ عَلَیَ اللهِ وَ کَذَّبَ بِالصِّدْقِ إِذْ جَاءهُ [Who then is more unjust than he who utters a lie against Allah and gives the lie to the truth when it comes to him] means they denied the truth which the Messenger of Allah (peace be upon him and his family) brought regarding the wilayah of the Commander of the Faithful, Ali (peace be upon him).

Ibn Abbas (may Allah have mercy on him): The Messenger of Allah (peace be upon him and his family) brought the truthful and true word, [the Quran,] [from Allah], and Ali (peace be upon him), the Commander of the Faithful, affirmed it. فَمَنْ أَظْلَمُ مِمَّنْ کَذَبَ عَلَی اللهِ وَ کَذَّبَ بِالصِّدْقِ إِذْ جاءَهُ [Who then is more unjust than he who utters a lie against Allah and gives the lie to the truth when it comes to him], and in another place he said: what is meant by "the truth" is the wilayah of the Ahl al-Bayt (peace be upon them).