The Meccan Revelations: Page 440 from Volume Four

He said, if he knew of a special joy that souls would rejoice in, then God does not like joy in that joy, and he mentioned the Almighty’s saying, “God does not like those who are happy,” so we learned that he was happy about a specific matter, so his joy was returned to joy because of that, so he was saddened by his joy in proportion to his joy. If it was great, his sadness would be greater, even if it was less than that. Sadness and sorrow were enough for him. Then God commanded His servants to rejoice in God’s grace and mercy, not in the money that He accumulated, for He left it with death in this world and did not advance it. So He commanded you to rejoice in grace and grace in excess of that, but He is also the one who created virtue, so He gave virtue to His creation, and it has no appearance except in you, so praise God. Where He has made you a subject of His grace and mercy, so rejoice at His command. Beware of joy and you will reap the fruit of performing your duty in joy .