Our exalted Prophet did teach his companions the book and wisdom behind it.
2:151 كَمَآ أَرۡسَلۡنَا فِيڪُمۡ رَسُولاً۬ مِّنڪُمۡ يَتۡلُواْ عَلَيۡكُمۡ ءَايَـٰتِنَا وَيُزَكِّيڪُمۡ وَيُعَلِّمُڪُمُ ٱلۡكِتَـٰبَ وَٱلۡحِڪۡمَةَ وَيُعَلِّمُكُم مَّا لَمۡ تَكُونُواْ تَعۡلَمُونَ
(Grace it is) that We have sent a Messenger from among yourselves, conveying Our
Revelations to you in order to help you grow in goodness, and empower you
with the knowledge of the Law and the wisdom behind it. Thus, he teaches
you what you knew not.
3:164 لَقَدۡ مَنَّ ٱللَّهُ عَلَى ٱلۡمُؤۡمِنِينَ إِذۡ بَعَثَ فِيہِمۡ رَسُولاً۬ مِّنۡ أَنفُسِهِمۡ يَتۡلُواْ عَلَيۡہِمۡ ءَايَـٰتِهِۦ وَيُزَڪِّيہِمۡ وَيُعَلِّمُهُمُ ٱلۡكِتَـٰبَ وَٱلۡحِڪۡمَةَ وَإِن كَانُواْ مِن قَبۡلُ لَفِى ضَلَـٰلٍ۬ مُّبِينٍ
God has done a great favor to the believers that He has sent a Messenger from
among themselves, who conveys to them His Messages (and establishes the
System) enabling them to grow in humanity, and imparts to them the Law
and the wisdom behind it. Before, they were in manifest error.
62:2 هُوَ ٱلَّذِى بَعَثَ فِى ٱلۡأُمِّيِّـۧنَ رَسُولاً۬ مِّنۡہُمۡ يَتۡلُواْ عَلَيۡہِمۡ ءَايَـٰتِهِۦ وَيُزَكِّيہِمۡ وَيُعَلِّمُهُمُ ٱلۡكِتَـٰبَ وَٱلۡحِكۡمَةَ وَإِن كَانُواْ مِن قَبۡلُ لَفِى ضَلَـٰلٍ۬ مُّبِينٍ۬
He is the One Who has raised among the Gentiles a Messenger from among themselves to convey to them His Messages, to make them grow their human
potential, to teach them the Law and the wisdom behind it. Whereas before
that they were obviously lost in error. [Ummi = Gentile = Non-Israelite =
Unlettered. Zaku, Tazkiah = Growth = Purity from vice = Development of
the 'self' = Self-actualization. Hikmah = Wisdom = Judgment = Governance]