Imam Zayn al-Aabidin (AS) said, ‘Woe unto him whose ones exceed his tens - by this he meant that the bad deed is counted one, but the good deeds are counted as ten.
تحف العقول : قال الإمامُ زينُ العابدينَ (عَلَيهِ الّسَلامُ) : يا سَوْأَتاهْ لِمَن غَلَبتْ إحْداتُهُ عَشَراتِهِ ـ يُريدُ أنَّ السَّيّئةَ بواحِدَةٍ والحَسَنةَ بعَشرَةٍ ـ.
Similar narrations
Al-Amālī #210"Woe to the one whose one triumphs over his ten (meaning the verse 160, Surah al-Ana’am: ’Whoever brings one good deed shall have ten fold...