Salam Ya Shaykh! May Allah give long and happy life to you and your deputies! (Ameen) my question is when Maulana Shaykh says pray 2 rakat before sleep etc… or in other posts the answer is pray 2 rakat. Does that mean 2 rakat Fard? Jasak Allah!
Tahajjud is offered after Isha prayer before Fajr. One is to offer Witr after Tahajjud, but if he/she fears that they will not be able to wake up on time then they should pray Witr before just in case. Two units of Tahajjud is what we believe Mawlana meant when he said that.