Numbers 5:23

“‘Then the priest will write these curses on a scroll and then scrape them off into the bitter water. ¹ 

Ex 17:14; De 31:19; 2Ch 34:24; Job 31:35; Ps 51:1,9; Isa 43:25; Isa 44:22; Jer 51:60-64; Ac 3:19; 1Co 16:21,22; Re 20:12

¹ sn The words written on the scroll were written with a combination of ingredients mixed into an ink. The idea is probably that they would have been washed or flaked off into the water, so that she drank the words of the curse – it became a part of her being.