Hawzah News Agency – The commander of the faithful Imam Ali peace be upon him says: 

لا تَكُونَنَّ عَبدَ غَيرِكَ وقَد جَعلَكَ اللَّهُ سُبْحانَه حُرّاً.

'Do not ever be a slave to others when Allah, glory be to Him, has made you free.'

Source: Ghurar al-Hikam, no. 10371