Zubayd bin al-Salt said: I heard Sayyiduna Umar (may Allah be pleased with him) say: When a person performs ablution and puts on his leather socks, let him wipe over them and pray in them, and if he wishes he need not take them off, except in a state of major ritual impurity (janabah), (when he should take them off).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1330