Question: May Allaah forgive you. Will the People of Paradise sleep? And what is the meaning of His saying, the Most High: “the best abode, and have the fairest of places for repose”? 
Answer: No. No they will not sleep. Sleep is the brother of death. And in Jannah there is neither sleep nor death. There is no illness nor old age. There are no worries, no sadness nor anguish. There is no urine, no excrement nor any bad smells. And for the women, no menstruation nor postpartum bleeding.
And there are no grudges, no malice nor envy. The envy will be removed from the chests of the Mu’mineen before they enter Paradise. They will stop on a bridge after they have crossed the Siraat. They will retaliate with each other for the complaints they have between themselves. Then the envy will be removed from their chests. And they will enter Paradise with the highest degree of purity. The Most High, said:
“And We shall remove from their breasts any sense of injury (that they may have), (So they will be like) brothers facing each other on thrones.” – Al-Hijr (15):47
And as for His saying:
The fairest of places for repose. – Al-Furqan (25):24
Meaning: (It is a) time for relaxation. The intent: This time, (the) time for relaxation will be there in Paradise. And its meaning is that Allaah, the Most High, will hold to account all His creation on the Day of Judgement. He will finish with them, proportionally, by the middle of the day. And He said about the People of Paradise in Paradise:
The dwellers of Paradise (i.e. those who deserved it through their Faith and righteousness) will, on that Day, have the best abode, and have the fairest of places for repose. – Al-Furqan (25):24
And sleep is the brother of death. And there is no death in Paradise. There is no sleep which is the brother of death. Yes.
 Soorah Al-Furqan, Ayaah 24
Answered by: Shaykh ‘Abdul ‘Azeez ibn ‘Abdullaah ar-Rajhi