Then those mendicants went up to the Buddha and told him Vakkali’s message.

Then the Buddha said to the mendicants, “Come, mendicants, let’s go to the Black Rock on the slopes of Isigili, where Vakkali, the gentleman, committed suicide.” “Yes, sir,” they replied. Then the Buddha together with several mendicants went to the Black Rock on the slopes of Isigili. The Buddha saw Vakkali off in the distance on his cot, lying with aggregates cast off.

Now at that time a cloud of black smoke was moving east, west, north, south, above, below, and in-between. The Buddha said to the mendicants, “Mendicants, do you see that cloud of black smoke moving east, west, north, south, above, below, and in-between?” “Yes, sir.” “That’s Māra the Wicked searching for Vakkali’s consciousness, wondering: ‘Where is Vakkali’s consciousness established?’ But since his consciousness is not established, Vakkali is quenched.”

Linked Discourses 22.88 9. Senior Mendicants With Assaji