Chosen Islamic Manners

'If he falls sick, visit him.'
*It is not lawful to force the sick to eat or drink.

Manners One Should Uphold in the Marketplace
*Upon entering the marketplace, one should recite the Du'aa specific to entering marketplaces, which is: 'laa e'laahah il'lal laah wah-dawho laa shareeka lawho. La-whol molk wa lahol hamd yuh-yee wa you-meet wa ho'wa hai'yon laa ya'moot be'ya'de-hil khair wa who-wa ala kol'lee shai'in qadeer.'

Meaning: None has the right to be worshipped except Allah alone. He has no partner and to Him belong the dominion and all praise. He brings into life and causes death and He is Hai’ (ever-living) and He never dies. In has hands is all goodness and He is capable of all things.
*It is appropriate for Muslims to educate themselves with the laws relevant to bartering.