Venerable Bhikkhuni Hasapanna discusses sutta 35.241 from the Samyutta Nikaya: Pathamadarukkhandhopama Sutta -The Simile of the Great Log. The 241st sutta of the Salayatana Samyutta (in the Samyutta Nikaya).
“The Buddha gives a parable of a large log floating downstream, which, if it steers clear of the many obstacles, will eventually reach the ocean. A mendicant asks for an explanation, and the Buddha clarifies each item. A cowherd named Nanda was listening, and determined to go forth”, Sutta Central.