ओंकारादर्धमात्रार्थं भावयन्मौनमास्थितः ।संशान्तसर्वसंकल्पः प्रशान्तकलनागणः
In plain words
-- contemplating, from Oṃkāra, the meaning of the ardhamātrā, remained settled in silence, all his saṃkalpas utterly stilled, the whole gathering of his kalanā calmed --