Nothing whatsoever should be clung to as 'I' or 'mine'.
... in the sphere of the Buddhist teachings ... there are the questions, 'Is there dukkha?' and 'How can it be quenched?' Knowing the root cause of dukkha, one will be able to extinguish it. And that root cause of dukkha is the delusion, the wrong understanding, that there is 'I' and 'mine'."
Heartwood of the Bodhi Tree - The Buddha's Teachings on Voidness
by Buddhadasa Bhikkhu, Wisdom, 1994