Is the opening supplication prescribed in every prayer, whether obligatory or voluntary?
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Question:
May Allah bless you. From the questions of Umm Muhammad, a resident of al-Baha, she says: Is the opening supplication specific to the obligatory prayers only? Or is it said in all prayers, including the regular voluntary prayers and other voluntary ones, such as the Duha prayer and others? We ask for your guidance.
Answer:
The opening supplication is general for all prayers, whether obligatory or voluntary. After the takbir of ihram, one proceeds with the opening supplication, whether the prayer is obligatory or voluntary, because the Prophet (peace and blessings be upon him), when he would stand for the tahajjud prayer at night, would say the takbir of ihram and then recite the opening supplication, saying: “O Allah, Lord of Jibril, Mikail, and Israfil,[Az-Zumar 39:46], guide me to the truth in which there is disagreement by Your permission, for You guide whom You will to a straight path. I have turned my face toward He who created the heavens and the earth, in pure submission, and I am not among those who associate partners with Allah” [Al-An'am 6:162-163] or he would say: “Glory is to You, O Allah, and praise, blessed is Your name, exalted is Your majesty, and there is no god but You,” or other forms of the opening supplication reported from the Prophet (peace and blessings be upon him). Yes.
May Allah bless you. From the questions of Umm Muhammad, a resident of al-Baha, she says: Is the opening supplication specific to the obligatory prayers only? Or is it said in all prayers, including the regular voluntary prayers and other voluntary ones, such as the Duha prayer and others? We ask for your guidance.
Answer:
The opening supplication is general for all prayers, whether obligatory or voluntary. After the takbir of ihram, one proceeds with the opening supplication, whether the prayer is obligatory or voluntary, because the Prophet (peace and blessings be upon him), when he would stand for the tahajjud prayer at night, would say the takbir of ihram and then recite the opening supplication, saying: “O Allah, Lord of Jibril, Mikail, and Israfil,
Say, "O Allah, Creator of the heavens and the earth, Knower of the unseen and the witnessed, You will judge between your servants concerning that over which they used to differ."
فَاطِرَ السَّمَاوَاتِ وَالْأَرْضِ عَالِمَ الْغَيْبِ وَالشَّهَادَةِ أَنتَ تَحْكُمُ بَيْنَ عِبَادِكَ فِي مَا كَانُوا فِيهِ يَخْتَلِفُونَ(162) Say, "Indeed, my prayer, my rites of sacrifice, my living and my dying are for Allah, Lord of the worlds. (163) No partner has He. And this I have been commanded, and I am the first [among you] of the Muslims."
إِنَّ صَلَاتِي وَنُسُكِي وَمَحْيَايَ وَمَمَاتِي لِلَّهِ رَبِّ الْعَالَمِينَ لَا شَرِيكَ لَهُ وَبِذَٰلِكَ أُمِرْتُ وَأَنَا أَوَّلُ الْمُسْلِمِينَ
Source
قناة «العلامة الدكتور صالح الفوزان»، هل يشرع دعاء الاستفتاح في كل صلاة فرض ونفل؟ الشيخ صالح الفوزان — youtube.com
The Arabic text is a machine transcription of the audio recording.