It is narrated from Sayyiduna Ali (may Allah be pleased with him) that when he heard the sound of the adhan he would say these words: "Ushhidu biha kulla shahid, wa atahammaluha 'an kulli jahid (I make every witness a witness to this (call of truth), and I take it upon myself (as a proof and responsibility) on behalf of every denier and rejecter)."
The chain of this narration contains Abd al-Rahman bin Ishaq al-Wasiti, a da'if (weak) narrator. Imam Ibn Abi Shaybah narrated this report in al-Musannaf (2291), and Imam al-Bayhaqi in al-Da'awat al-Kabir (41).
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الصلاة / 241
Hadith Gradingمحدثین:إسناده ضعيف جدًا
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :الأثر ضعيف جدًا. » «انفرد به المصنف من هذا الطريق»