Praise be to Allah,
Wakee’ ibn al-Jarrah narrated to us from Yazeed ibn Abu Saalih, a good looking tanner who had narrated four ahadith, who said that he had heard Anas ibn Maalik say”Allah’s Messenger (PBUH) said,
‘Some people [from amongst the Muslims] will be admitted into Hell, then when they have been reduced to charcoal they will be brought out and admitted into Paradise. The dwellers of Paradise will say [about them], ‘These are al-jahannamiyyoon (the infernal ones).”‘
(Musnad Ahmad, Vol. 3, p. 183. The isnaad of this hadeeth is Saheeh and its transmitters are ‘trustwo1thy’ (thiqaat).
Source:
Thulaathiyyaat Musnad Ahmad ibn Hanbal (may Allah have mercy on him)
Reports of Imaam Ahmad that have only three narrators between him and the Prophet, peace, and blessings be upon him.
Shaykh Muhammad ibn Ahmad ibn Saalim as–Saffaareenee al–Hanbalee ~(1114 –1188 AH)