Jami At Tirmidhi
435
Very Daif+3

Abu Hurairah narrated that:Allah's Messenger (S) said: "Whoever prays six Rak'ah after Al-Maghrib, and he does not speak about anything between them, then they will be counted for him as twelve years of worship

Very DaifAhmad Muhammad Shakir
Very DaifAl-Albani