Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: Sin makes the heart troubled. In one narration the wording is: It is what troubles the breasts.
In one narration the wording is: In whatever is looked at, Satan has some hope, and sin is what troubles the hearts. Al-Tabarani recorded all these narrations with chains whose narrators are thiqat (trustworthy). (Allamah al-Haythami says:) I say: Ibn al-Athir mentioned three forms of the word in his book "al-Nihayah": hawwaz, hawazz and hazzaz (the literal meaning of hawwaz is matters that cause pain to the heart, that is, unease or distress).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب العلم / 819
Hadith Gradingمحدثین:إسنادہ حسن بشواہدہ۔
Hadith Takhrij«اخرجه الامام الطبراني فى معجمه الكبير 8748»