Our Lord! Send amongst them a Messenger of their own, who shall recite unto them Your verses and instruct them in the Book (this Qur`ān) and Al-Ḥikmah (wisdom) and sanctify them. Verily! You are the All-Mighty, the All-Wise.” [Al-Baqarah 2:129]
And remember (O members of the Prophet’s family) that which is recited in your houses of the Verses of Allāh and Al-Ḥikmah. [Al-Ahzab 33:34]
It is reported that Al-Ḥasan Al-Baṣrī – Allāh have mercy on him said, “Al-Kitāb is the Qur`ān, and Al-Ḥikmah is the Sunnah.”
It is also reported that Qatādah – Allāh have mercy on him said, “And [he will] teach them The Book and Al-Ḥikmah, i.e. the Sunnah.”
Al-Lālakā`ī, Sharḥ Usūl I’tiqād Ahl Al-Sunnah wa Al-Jamā’ah Vol.1 p86, 87; Ibn Battah, Al-Ibānah Al-Kubrā Vol.1 p98; and Al-Ṭabarī in his Tafsīr.
Shaykh Al-Islām Ibn Taymīyah said (Majmū’ Al-Fatāwā Vol.3 p366), “A number of the Salaf said that Al-Ḥikmah refers to the Sunnah, because that which was recited in the houses of [the Prophet’s] wives – Allāh be pleased with them – apart from the Qur`ān was his Sunnah – Allāh’s peace and blessings be upon him.”