Covering the lower face in prayer

Sayyiduna Ibn Umar (may Allah be pleased with them both) disliked that a man should cover his mouth (with a cloth) in prayer.

Sa'id bin al-Musayyib and Ikrimah disliked that a man should cover his mouth (with a cloth) in prayer.

Tawus disliked that a man should pray with his mouth covered (with a cloth).

Ibrahim disliked that a man should cover his mouth (with a cloth) in prayer.

Al-Hasan disliked that a man should pray with his mouth covered (with a cloth).

Ata bin al-Sa'ib disliked covering the mouth (with a cloth) in three situations: in fighting, at funerals and in prayer.

Sayyiduna Ali (may Allah be pleased with him) disliked covering the nose and mouth in prayer.