ABU ABDILLAH JAAFAR BIN MOHAMMAD AL - SADIQ (ASWS) narrated from his FATHER (ASWS), fom the MESSENGER OF ALLAH (SWT), who said:
On the Day Of Judgement, I will repay those who supported my family with even as little as a carate, with (as much as) a quintal.
(Ref: Bihar Al-Anwar 26:228, amaali of Tousi 2:55)