Anandakanda 1.4.54

1.4.54

āpyāyanārthaṃ sūtasya karma kuryānnirodhanam /
atha karma nirodhākhyaṃ peṣayellavaṇaṃ jalaiḥ //

for the sake of rejuvenating quicksilver, one should perform the operation of restraining. / Now, regarding the operation called restraining: one should grind salt with water;