In Parashat Vayeshev, Bereshit / Genesis 37:1-37:36, we read 37:3 Now Israel loved Joseph more than all his sons, because he was the son of
his old age; and he made him a varicolored tunic. 37:4 His brothers saw that their father loved him more
than all his brothers; and so they hated him and could not speak to him on friendly terms. (NASB)
Even today, most parents love to bestow lavish gifts on their children. Read More here.