It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "Whoever looks at his brother with a look of love, while there is no rancour against him in his heart, his past sins are forgiven before he even blinks."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Kulayb bin Wa'il except Sawwar bin Mus'ab, and Yahya bin Sa'id al-Attar is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 8251
Hadith Gradingمحدثین:إسناده ضعيف جدًّا، فيه سوار بن مصعب متروك
Hadith Takhrij«قال ابن عدي: عامة ما يرويه ليس محفوظ وهو ضعيف كما ذكروهيرمز «الكامل في الضعفاء، ج 4، ص 532»» «قال الهيثمي: فيه سوار بن مصعب وهو متروك «مجمع الزوائد ومنبع الفوائد، ج 10، ص 275»»