How to bless a handmade gift

First, my apologies ,what I’m about to ask isn’t strictly related to Quareia, and it may come across as a bit naïve, but I don’t know of a better place to ask. I’m planning to knit a scarf for someone dear to me, and I’m wondering about the most appropriate way to add intention to it (protection , healing). Is it better to put intention in each stitch, or to bless the finished piece at the end (how to do it properly)? I’ve also heard of practices that involve breathing intention into knots. Is anyone here familiar with something along those lines?