Bread and butter
ʔalχubz wazzubda alkʌbz wɑːɹ alzʌbdə
In Arabic الخبز والزبدة (al-khubz wa al-zubda)
This phrase, literally 'the bread and the butter', is used to describe the basics or one's main source of income.
Example
"بيع العقارات هو خبزه وزبدته (Bay' al-'aqarat huwa khubzuhu wa zubdatuhu)."