In Jain tradition, the reference to "ministers with nine sons" is associated with the story of King Shrenik (Bimbisara) and his ministers. Specifically, the reference is often made in connection with the Uttaradhyayana Sutra, where there is mention of the chief minister Abhayakumar and other ministers who had several sons.

However, the most direct mention comes in the context of the Nava Prabhṛti (नव प्रभृति), which refers to the nine famous ministers of King Shrenik, each of whom had a notable son. These nine sons later became prominent disciples under the leadership of Mahavira. The Nava Prabhṛti include:

1. Abhaya
2. Padma
3. Laghupadma
4. Dhanna
5. Vira
6. Shubhuma
7. Shravaka
8. Soma
9. Shalibhadra

These nine sons are celebrated in Jain literature for their devotion and role in spreading Jain teachings. Their stories are found in various Jain texts, including the Uttaradhyayana Sutra and other commentarial literature.

Summary: The nine sons of ministers, often referred to as "Nava Prabhṛti," are mentioned in Jain scriptures such as the Uttaradhyayana Sutra. They were influential lay followers connected with King Shrenik’s court and played a significant role in Jain history.