Explanation to: "Qabli" and "Baadi" in Salaat As-Salaam 'Alaykum wa Rahmatullaahi wa Barakaatuh. Authubillah Minash-Sheatanirrajeem. Bissmillahi Rahmani Raheem Qabli: Is the SUJUD you make before SALAM when you "Mistakenly Omit Obligatory parts of Salaat". Baadi: Is the SUJUD you make after SALAM when you "mistakenly ADD during salaat". During salaat one may make a mistake and ADD something to his or her salaat or OMIT something in salaat. These two mistakes often confuse us on how to compensate for them. We need to understand the two terms because they are very important to complete our salaat properly. When you add anything: "like Rakaat, Sujuud etc in Salaat which makes the Salaat more than expected, we term it BAADI. To compensate for it, "You will add two sujuud after final Tashahhud and Tasleem then sit down to repeat tashahhud and Tasleem to complete your salaat". On the other hand, when you noticed you've shortened or omitted something in your salaat then compensate with QABLI. It is compensated with two sujuud after the final Tashahhud before final Tasleem". If you are wondering about omitting something whiles reciting Tashahhud then just do Qabli and try to increase your Sunnah salaat or Naflat salaat to help fix any unknown mistakes to your fard prayers. Note: Tashahhud is the ''Attahiiyaat to end'' and Tasleem is the final ''Assalaamu Alaikum Warahmatullah* we say by turning our head to the right then to the left''. May Allah keep guiding us alright and may He forgive our mistakes, Amin. .