Information pertaining to Qadha Salaah

Question

As-Salaam-U-Alakum Mufti,
We are aware of the origin of Salaah & that we must read it on time. Please advise the origin of reading Khazaah Salaah, when one misses the time of Salaah & where can we read more about Kazaah Salaah.
Shukraan & Was-Salaam.

zd · Answer

Nabi (S.A.W) made Qaza when Salaat was missed in the Battle of the trench.