Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 1 year ago

The Prayer is valid.

If you remembered that you missed on Sajda by mistake, you should perform it immediately after the Prayer then perform 2 Sajda of Sahw (forgetting). The way of performing the two Sajda of Sahw is just prostrating and saying during Sajda (BISMILLAH WABILLAH ALLAHUMMA SALLI 'ALA MUHAMMAD WA AALI MUHAMMAD) then sitting and going again to Sajda and saying the same, then sitting and reciting Tashahhud and Salam.