Explanation: The Sultans required the holders of iqta’s (called muqtis or walis) to maintain troops for royal service out of the taxes collected by them.

• Certain areas were retained by the Sultans under their direct control (khalisa).
• It was out of the revenue collected from such areas that they paid the officers and soldiers of the sultan’s own troops (hashm-i qalb).

Source: Tamil Nadu NCERT