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

يُجبَلُ المؤمنُ على‏ كُلِّ طَبيعةٍ إلّا الخِيانَةَ والكَذِبَ.

'The believer is naturally disposed to all the traits except betrayal and lying.'

Source: al-Ikhtisas, p. 231