"Verbal reassurance" refers to providing comfort or support through spoken words. It means using language to assure someone, make them feel secure, or alleviate their doubts or fears. Full definition
The parent responds and stays with their child and offers physical and verbal reassurance without putting the child to sleep. (heartsdreams.com)
With this method the parent stays with their child during the sleep coaching process and allows you to offer physical and verbal reassurance while the child learns this new skill. (msdbabysleepcoach.com)
Some experts say you can touch her to let her know you're there, while others say you should stick to verbal reassurance only. (thespruce.com)