Alma 19:11

And it came to pass that she watched over the bed of her husband, from that time, even until that time on the morrow which Ammon had appointed that he should rise.

She watched over her husband’s bed from that time until the next day. This was the time Ammon had said he would rise.

From that moment on, she kept watch over her husband's bed, right up until the time the next day when Ammon said he would wake.