Hadith.1649 - Imam Jafar ibn Muhammad Al-Sadiq عليه السلام said:
"Indeed, Allah سبحانه وتعالى, there is no god but Him, when He prohibited charity (Sadaqah) for us, He ordained Khums for us. Thus, charity is forbidden to us, Khums is an obligation for us, and gifts of honor are permissible for us."