https://thornhillkollel.com/wp-content/uploads/2016/02/shabbos-perek-yud-tes-mishna-5-if-it-is-not-known-if-shabbos-is-the-childs-8th-day.mp3“shabbos perek yud tes mishna 5 if it is not known if shabbos is the child’s 8th day”.