that we worship none but Allāh and that we worship Him only with what He has prescribed, not with innovations. As He, the Exalted, said (Sūrah al-Kahf, 110): "So whoever hopes for the meeting with his Lord, let him do righteous work and not associate anyone in the worship of his Lord." This is the realization of the two testimonies: the testimony that there is no deity but Allāh and the testimony that Muḥammad is the Messenger of Allāh. In the first: that we worship none but Him. In the second: that Muḥammad is His Messenger who conveys from Him, so we must believe his report and obey his command. He has clarified for us what we should worship Allāh with and has forbidden us from innovations, informing us that they are misguidance. He, the Exalted, said (Sūrah al-Baqarah, 112): "Yes, whoever submits his face to Allāh while being a doer of good will have his reward with his Lord. And no fear will there be concerning them, nor will they grieve." Just as we are commanded to fear none but Allāh, to rely only on Allāh, to desire only from Allāh, and to seek help only from Allāh, and that our worship should be for Allāh alone. Likewise, we are commanded to follow the Messenger, obey him, and emulate him; what is lawful is what he has made lawful, and what is unlawful is what he has prohibited
أَلا نعْبد إِلَّا الله وَلَا نعبده إِلَّا بِمَا شرع لَا نعبده بالبدع. كَمَا قَالَ تَعَالَى [١١٠ الْكَهْف] : ﴿فَمن كَانَ يَرْجُو لِقَاء ربه فليعمل عملا صَالحا وَلَا يُشْرك بِعبَادة ربه أحدا﴾. وَذَلِكَ تَحْقِيق الشَّهَادَتَيْنِ: شَهَادَة أَن لَا إِلَه إِلَّا الله وَشَهَادَة أَن مُحَمَّد رَسُول الله. فَفِي الأولى: أَلا نعْبد إِلَّا إِيَّاه. وَفِي الثَّانِيَة: أَن مُحَمَّدًا هُوَ رَسُوله الْمبلغ عَنهُ فعلينا أَن نصدق خَبره ونطيع أمره. وَقد بَين لنا مَا نعْبد الله بِهِ ونهانا عَن محدثات الْأُمُور وَأخْبر أَنَّهَا ضَلَالَة. قَالَ تَعَالَى [١١٢ الْبَقَرَة] : ﴿بلَى من أسلم وَجهه لله وَهُوَ محسن فَلهُ أجره عِنْد ربه وَلَا خوف عَلَيْهِم وَلَا هم يَحْزَنُونَ﴾. وكما أننا مأمورون أَلا نَخَاف إِلَّا الله وَلَا نتوكل إِلَّا على الله وَلَا نرغب إِلَّا إِلَى الله وَلَا نستعين إِلَّا بِاللَّه وَألا تكون عبادتنا إِلَّا لله. فَكَذَلِك نَحن مأمورون أَن نتبع الرَّسُول ونطيعه ونتأسى بِهِ فالحلال مَا حلله وَالْحرَام مَا حرمه.