I am aware of a wise man who has 10 pieces of advice to his son. In Surah Luqman:
1. "…O my son! Join not in worship others with God. Verily! Joining others in worship with God is a great wrong indeed." (Quran 31:13)
2. "And we have enjoined on man to be dutiful and good to his parents…" (Quran 31:14)
3. "O my son! If it be (anything) equal to the weight of a grain of mustard seed, and though it be in a rock, or in the heavens or in the earth, Allah will bring it forth…" (Quran 31:16)
4. "O my son! Offer prayer perfectly…" (Quran 31:17)
5. "…enjoin on people all that is good and forbid them from all that is evil…" (Quran 31:17)
6. "…and bear with patience whatever befalls you…" (Quran 31:17)
7. "And turn not your face away from men with pride…" (Quran 31:18)
8. "…nor walk in insolence through the earth. Verily, Allah likes not any arrogant boaster." (Quran 31:18)
9. "And be moderate (or show no insolence) in your walking…" (Quran 31:19)
10. "…and lower your voice. Verily, the harshest of all voices is the braying of the asses." (Quran 31:19)
Luqman the wise counsels his son with 10 pieces of advice. It is important to note that Luqman begins with the most important lesson; belief in One God. He also makes clear that joining others in worship with God is the only unforgivable sin.
This is one of the essences of Shahadah...
Source: received through WhatsApp message (bro Zaid, Transformation Group)