रागादिगुणशून्यस्य शिवस्य परमात्मनः ।सरागविषयाभ्यासत्यागस्ताम्बूलचर्वणम् ॥ २३ ॥
In plain words
For Śiva, the supreme Self, in whom there is no passion and no attribute at all: letting go of the habit of reaching again and again for the things you desire — that is the betel He chews.
Close to the Sanskrit
Of Śiva, the supreme Self, who is empty of the qualities beginning with passion — the abandonment of the habitual pursuit of objects charged with desire is the chewing of betel.