These days the mendicants live using wood blocks as pillows, and they meditate diligently and keenly. Māra the Wicked finds no vulnerability, he’s got no opportunity. But in the future the mendicants will become delicate, with soft and tender hands and feet. They’ll sleep on soft beds with down pillows until the sun comes up. Māra the Wicked will find a vulnerability and get an opportunity. So you should train like this: ‘We will live using wood blocks as pillows, and we will meditate diligently and keenly.’ That’s how you should train.”

Linked Discourses 20.9 1. Similes A Bull Elephant

So I have heard. At one time the Buddha was staying near Sāvatthī in Jeta’s Grove, Anāthapiṇḍika’s monastery. Now at that time a certain junior mendicant went to visit families too often. The mendicants said to him, “Venerable, don’t go to visit families too often.” But that mendicant, when spoken to by the mendicants, said this, “But these senior mendicants think they can go to visit families, so why can’t I?”

And then several mendicants went up to the Buddha, bowed, sat down to one side, and told him what had happened. The Buddha said: