Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates this statement of the Prophet (peace and blessings be upon him): "When a person performs prayer, he should not place his shoes to his right side or to his left side, otherwise they will be on another person's right side. However, if there is no one present on his left side, then (he may place them there), or he should place (the shoes) between his two feet."
Hadith Referenceصحیح ابن حبان / كتاب الصلاة / 2188
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيحسن صحيح - «صحيح أبي داود» (661 و 662) «المشكاة» (767).فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده حسن في الشواهد، أبو عامر الخزاز -واسمه صالح بن رستم-وإن كان من رجال مسلم فهو كثير الخطأ.