The Prophet Muhammad (blessings and peace of Allah be upon him) used to say this du`a for wearing new clothes: “Allahumma laka al-hamd, anta kasawtanihi, as-aluka min khayrihi wa khayri ma suni‘a lah, wa a‘udhi bika min sharrihi wa sharri ma suni‘a lah.”

We say Bismillah before any task for two reasons: 1- seeking blessing by beginning in the name of Allah, 2- To make our beginning exclusively in the name of Allah.