4. Ali has narrated from Muhammad ibn ‘Isa from Yunus from Muhammad ibn Muslim who has narrated the following: “I once asked one of the two Imam, (abu Ja’far or abu ‘Abd Allah), ‘Alayhim al-Salam, about a child, a slave and a Christian who bear testimony; then the Christian becomes a Muslim, if his testimony becomes admissible. He (the Imam) said, ‘Yes, it becomes admissible.’”