4. A number of our people have narrated from Sahl ibn Ziyad and Ahmad ibn Muhammad from ibn Mahbub from ‘Abd Allah ibn Sinan who has said the following: “Once, a man asked abu ‘Abd Allah , when I was listening, ‘We perhaps order a man to buy for us land, house, slave or slave-girl and assign for him a certain amount. He (the Imam) said, ‘It is not unlawful.’”