Baby consume soapy water during bath

My baby is 3 months old and love sucking his fingers, hand, even during bath. So when we’re bathing him, we would also wash his hands and he would instantly put it in his mouth. Which means he would also swallow abit of the reamining soapy water, is it ok for them to suck on soapy water? Its not foamy, we’re using mustela or kodomo.