قال السيد الرضى: و تصديق ذلك كتاب الله قال الله فى الدعاء ﴿ادْعُونِي أَسْتَجِبْ لَكُمْ﴾ وقال فى الاستغفار ﴿وَمَن يَعْمَلْ سُوءًا أَوْ يَظْلِمْ نَفْسَهُ ثُمَّ يَسْتَغْفِرِ اللهَ يَجِدِ اللهَ غَفُورًا رَّحِيمًا﴾ وقال فى الشكر ﴿لَئِن شَكَرْتُمْ لَأَزِيدَنَّكُمْ﴾ وقال فى التوبة ﴿إِنَّمَا التَّوْبَةُ عَلَى اللهِ لِلَّذِينَ يَعْمَلُونَ السُّوءَ بِجَهَالَةٍ ثُمَّ يَتُوبُونَ مِن قَرِيبٍ فَأُولَـٰئِكَ يَتُوبُ اللهُ عَلَيْهِمْ ۗ وَكَانَ اللهُ عَلِيمًا حَكِيمًا﴾.
As-Sayyid ar-Raḍī says: This is confirmed by the Book of Allāh. About praying, Allāh says: “Call you to Me, I will answer you” (Qur’ān, 40:60). About forgiveness Allāh says: “And whoever does evil, or wrongs his own self and thereafter seeks pardon of Allāh, shall find Allāh Oft-forgiving, Merciful” (Qur’ān, 4:110). About gratefulness He says: “If you be grateful I will increase (my favours) to you” (Qur’ān, 14:7). About repentance He says: “Verily, repentance (acceptable) with Allāh is only for those who do evil ignorantly and then turn (to Allāh) soon (after); these (are those) Allāh will turn (merciful) to them; and Allāh is All-knowing, All-wise” (Qur’ān, 4:17).