Sahih al-Bukhari 4587
Sahih al-Bukhari · Book 65: Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh)) · Allah's Statement "And what is wrong with you that you fight not in the Cause of Allah... (till) ... whose people are oppressors..." (V.4:75)
Narrated Ibn `Abbas:
حَدَّثَنِي عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ ، حَدَّثَنَا سُفْيَانُ ، عَنْ عُبَيْدِ اللَّهِ ، قَالَ سَمِعْتُ ابْنَ عَبَّاسٍ ، قَالَ كُنْتُ أَنَا وَأُمِّي، مِنَ الْمُسْتَضْعَفِينَ.
My mother and I were among the weak and oppressed (Muslims at Mecca).