“Once a man mentioned his wife before abu ‘Abd Allah (a.s.), and he praised her quite well. Abu ‘Abd Allah (a.s.), asked, ‘Have you made her jealous?’ He replied, ‘No, I have not done so.’ He (the Imam) said, ‘Make her feel jealous.’ He did so and he found the proof; then said to abu ‘Abd Allah (a.s.), that he has found the proof and she is as he (the Imam) has said.’”