Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh

 

Buying those goods on credit where merchandize is delivered to a purchaser while price is paid later is a permissible transaction provided that this merchandize is not gold or silver. If it involves gold or silver, delayed payment will be classified as usury.

 

The Prophet bought the camel of Jabir and gave him the price later. Moreover, `Aisha said, “The Prophet (peace be upon him) bought some foodstuff on credit for a limited period and mortgaged his armor for it.” (Al-Bukhari)

 

Almighty Allah knows best.