An imaginal bond (الجامع الخيالي) exists when images habitually arise together in imagination or when a speaker places them in one evocative scene. They need not be identical in kind or logically opposed.
«ثَلَاثَةٌ تُشْرِقُ الدُّنْيَا بِبَهْجَتِهَا: شَمْسُ الضُّحَى وَأَبُو إِسْحَاقَ وَالْقَمَرُ»
Three bring radiance to the world through their beauty: the morning sun, Abū Isḥāq, and the moon.
The poet combines celestial objects with a praised person in a single imaginative picture of radiance. The person is not literally of the same class as the sun or moon. The relationship is deliberately poetic and figurative, which explains why the coordinated list is intelligible.