Allah [M.G] revealed to Dawud (Prophet David (a.s) saying: 'Sometimes, My servant brings Me one good deed and I make Paradise lawful for him.' Dawud (a.s) asked, 'O Lord: what is that good deed?' 'It is bringing happiness to My believing servant,' he said, 'even if it be with a single piece of date.' 'O Lord,' responded Dawud, 'One who knows You will never lose hope in You.'