اللّهُـمَّ لَـكَ الْحَـمْـدُ أَنْـتَ كَسَـوْتَنِيهِ ، أََسْـأَلُـكَ مِـنْ خَـيْرِهِ وَخَـيْرِ مَـا صُنِـعَ لَـهُ ، وَأَعُـوْذُ بِكَ مِـنْ شَـرِّهِ وَشَـرِّ مَـا صُنِـعَ لَـهُ
Allāhumma lakal-ḥamdu 'anta kasawtanīhi, 'as'aluka min khayrihi wa khayri mā ṣuni`a lahu, wa 'a`oothu bika min sharrihi wa sharri mā ṣuni`a lahu
Translation
O Allah, for You is all praise, You have clothed me with it (i.e. the garment). I ask You for the good of it and the good for which it was made, and I seek refuge with You from the evil of it and the evil for which it was made.
When to recite
When putting on a new garment.
Source / Reference
Hisnul Muslim 6