The Islamic Development Bank (IsDB) has hired banks to arrange a new issue of U.S. dollar-denominated sukuk, or Islamic bonds, expected to be more than $1 billion in size, said two sources familiar with the matter. The Jeddah-based triple A-rated institution issues sukuk regularly to promote Islamic finance and attract liquidity to the sukuk market.

It has hired a group of banks including Emirates NBD , Standard Chartered, Gulf International Bank and HSBC to arrange the new transaction, expected to take place next month.

IsDB was last in the market in April this year with a $1.5 billion five-year sukuk deal. It generally issues dollar-denominated bonds twice a year, and last year it also sold its first sukuk denominated in euro.

The new transaction will be more than $1 billion in size, with one of the sources saying it could go up to $1.5 billion.

Its April sukuk was arranged by Credit Agricole, Emirates NBD Capital, First Abu Dhabi Bank, Gulf International Bank, HSBC, JPMorgan, Natixis and Standard Chartered.