The narrator said: I think it is from the Messenger of Allah (peace and blessings be upon him), who said: "When a person prays without a sutrah, these things break his prayer." He did not mention the Christian, and he mentioned "the woman" without the word "who has reached puberty". And he said: "However, if these things pass at a distance farther than a stone's throw, the prayer is not broken."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3488