Paṭhamadārukkhandhopamasutta
Ekaṁ samayaṁ bhagavā kosambiyaṁ viharati gaṅgāya nadiyā tīre. Addasā kho bhagavā mahantaṁ dārukkhandhaṁ gaṅgāya nadiyā sotena vuyhamānaṁ. Disvāna bhikkhū āmantesi: “passatha no tumhe, bhikkhave, amuṁ mahantaṁ dārukkhandhaṁ gaṅgāya nadiyā sotena vuyhamānan”ti? “Evaṁ, bhante”. “Sace so, bhikkhave, dārukkhandho na orimaṁ tīraṁ upagacchati, na pārimaṁ tīraṁ upagacchati, na majjhe saṁsīdissati, na thale ussīdissati, na manussaggāho gahessati, na amanussaggāho gahessati, na āvaṭṭaggāho gahessati, na antopūti bhavissati; evañhi so, bhikkhave, dārukkhandho samuddaninno bhavissati samuddapoṇo samuddapabbhāro. Taṁ kissa hetu? Samuddaninno, bhikkhave, gaṅgāya nadiyā soto samuddapoṇo samuddapabbhāro.
The Simile of the Tree Trunk (1st)
At one time the Buddha was staying near Kosambī on the bank of the Ganges River. Seeing a large tree trunk being carried along by the current, he addressed the mendicants, “Mendicants, do you see that large tree trunk being carried along by the current of the Ganges River?” “Yes, sir.” “Mendicants, assume that that tree trunk doesn’t drift toward the near shore or the far shore, or sink in the middle, or get stranded on high ground. And assume that it doesn’t get taken by humans or non-humans or caught up in a whirlpool, and that it doesn’t rot away. In that case, that tree trunk will slant, slope, and incline toward the ocean. Why is that? Because the current of the Ganges River slants, slopes, and inclines toward the ocean.