Shirk In Attributes(sifaat)
Associating a divine attribute to others means it is associated in the absolute term which is exclusive to God. Rahim meams compassionate. Qur’an used this attribute for God and for the prophet because God is compassionate and the prophet was compassionate. Our parents are compassionate too. But we know the difference of compassion of God and others. There is no trace of shirk here. The principle is that attributes of God can’t be used for others with the same absolute form. Like God is all-knowing. No other one can be all-knowing.