Hawzah News Agency – Imam Sadiq peace be upon him says:

البَسْ وتَجَمّلْ، فإنَّ اللَّهَ جميلٌ‏يُحِبُّ الجَمالَ، وليَكُن مِن حَلالٍ.

'Dress up and beautify yourself, for Allah is beautiful and He loves beauty; and make sure it is lawful [beautification].'

Source: Wasa'il al-Shia, v. 3, p. 340, no. 4