In another Hadith, Hazrat Rasulullah (sallallahu ‘alaihi wasallam) said, “Verily Allah Ta‘ala has made the fast of Ramadhaan fardh upon you, and I have made Taraaweeh Salaah during its nights sunnah for you. The one who fasts during the days and stands up during the night in Taraaweeh Salaah with true faith and the hope of receiving reward from Allah Ta‘ala, he will be cleansed from all his sins like the day his mother gave birth to him.” (Sunan Nasaa’i #2210)

Imaam Baihaqi (rahimahullah) has reported, via an authentic chain of narrators, that in the era of Hazrat Umar (radhiyallahu ‘anhu), all the Sahaabah (radhiyallahu ‘anhum) had consensus upon the Taraaweeh Salaah being twenty rakaats.” (Sunan Kubra #4288-4290)