Dhikir of Allah during business
Dhikir of Allah at intervals while engaged in business is a source of great reward and merit. It is mentioned in hadith that in a place where people are oblivious to dhikir, remembrance of Allah is like being steadfast in jihad, when others are running away. (Targhib, p. 193, vol. 3 ref. Bazar and Tibrani)
Abu Qabala, one of the famous followers (tabi'in) said that once two men met in the market and one said, "Come let us seek Allah's pardon when others are forgetful of Allah." The second man did it. The one of them died and the other saw him in a dream saying, "Allah had pardoned us on the very same evening we had met in the market."