(a) Sayyiduna Ibn Mas'ud (may Allah be pleased with him) was asked about a man who begins his ablution with the left before the right, and he granted a concession for it.
(b) Abdullah al-Hilali heard Sayyiduna Ibn Mas'ud (may Allah be pleased with him) say: If he wishes, he may begin the ablution from the left side.
(c) It is narrated from Abdullah bin Mas'ud (may Allah be pleased with him) that he was asked about a man who began his ablution from the left side, and he said: There is no harm.
(d) Abdullah bin Mas'ud (may Allah be pleased with him) said: There is no harm in beginning with your feet before your hands.
Al-Daraqutni said: This is mursal and is not established, because Mujahid did not meet Abdullah bin Mas'ud.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 407