Verbalizing “Lekavod Shabbos Kodesh” when buying and doing things for Shabbos:
It is proper for one to say on every item of purchase “This is for the honor of Shabbos”. Likewise, on all matters that one does it is good to think that he is doing so for the honor of Shabbos.
 Admur 250:6; M”A 250:1 in name of Arizal; M”B 250:2
 Lit. good
 The reason: As by doing so the holiness of Shabbos befalls onto that food. [Machatzis Hashekel, brought in Ketzos Hashulchan 70 footnote 13]