What is Happiness?
"Then the LORD your God will prosper you abundantly in all the work of your hand, in the offspring of your body and in the offspring of your cattle and in the produce of your ground, for the LORD will again rejoice over you for good, just as He rejoiced over your fathers; if you obey the LORD your God to keep His commandments and His statutes which are written in this book of the law, if you turn to the LORD your God with all your heart and soul.
Psalm 144:15King James Version (KJV)
15 Happy is that people, that is in such a case: yea, happy is that people, whose God is the Lord.
“Those who believe, and whose hearts find satisfaction in the remembrance of Allah: for without doubt in the remembrance of Allah do hearts find satisfaction.” Quran 13:28
“As to the Righteous, they will be in Gardens, and in Happiness,” Qur’an 52:17
“Those who believe (in the Oneness of Allah - Islamic Monotheism), and work righteousness, Tuba (it means all kinds of happiness or name of a tree in Paradise) is for them and a beautiful place of (final) return.” Qur’an 13:29