Brahmanas and Kshatriyas can partake of food given by such Vaishyas as serve the sacred fire everyday as are faultless in character and as perform the VOW of Chaturmasya.
वैश्यास्तु भोज्या विप्राणां क्षत्रियाणां तथैव च। नित्याग्नयो विविक्ताश्च चातुर्मास्यरताश्च ये॥