Girls, hello everyone! Tell me how you introduced water to babies? Did…

Girls, hello everyone! Tell me how you introduced water to babies? Did their stool change in the process? The thing is that until now I haven't given water to my child, but the pediatrician strongly recommends introducing it as the baby has jaundice. Ursosan has already been taken, but we haven't completely gotten rid of the jaundice. He drinks very little water, a couple of sips, and at the same time his stool became very liquid. So I'm thinking about continuing to give him water. What would you recommend?