عِيشَةٍ رَاضِيَةٍ
A pleasing, contented life; in the surface wording, “a life that is content.”
The one who is actually pleased is the person living that life, not the life itself. Nevertheless the participle rāḍiyah (راضية) is assigned to the life, which is connected to the experiencer's contentment.
This illustrates an association with the experienced or affected object. The resulting expression conveys the quality of life vividly without a full explicit clause about its possessor.