四須臾

(四須臾, 四须臾)

The four short divisions of time: a wink; a snap of the fingers; [lang id =1028]羅預 a lava, 20 finger-snaps; and [lang id =1028]須臾 (sa) kṣaṇa, said to be 20 lava; but a lava is 'the sixtieth of a twinkling' (M. W. ) and a (sa) kṣaṇa an instant.