Keep feeding until they stop taking it.
I read that everywhere, and it is very misleading, and can lead to an empty hive. My bees NEVER stop taking syrup, they will fill every corner, every crevice, every cell with it, and leave no space for the queen to lay, right to the point they move out.
I have learned to feed slower... I use jars over the inner cover with only three tiny holes... so they GET syrup when they need it, but they dont get enough to backfill the brood nest.
Bottom line.. keep an eye on them to make sure it doesnt happen.. if they are filling the brood chamber, stop feeding for a few days. K, back to the regularly scheduled thread...