Abd al-Hamid bin Mahmud says: We were with Sayyiduna Anas bin Malik (may Allah be pleased with him) in the row, and they pushed us between the pillars, so he moved back. When he had prayed, he said: We used to avoid this in the time of the Prophet (peace and blessings be upon him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5204