It is stated that those in Paradise will glorify Allah in the morning and in the evening. Is there worshiping (ibadat) in Paradise?

Dear Brother / Sister,

Ubudiyyat is to be pleased with what Allah does; and ibadat is to do what Allah is pleased with. Ibadat is exhibited in certain forms such as daily prayers, fasts and the like; and ubudiyyat explains a state in which one should always be. From this perspective, we can say that for human there will not be worshiping (ibadat) in Paradise but the meaning of ubudiyyat will continue.
As there is no sun in Paradise (The Qur'an, Al-Insan, 76:13), day and night do not take place there, either. However, as is asked in the question, in a hadith the expression “in the morning and in the evening” is used.
Similarly, in a hadith narrated by Bukhari, it is stated: “The hearts of the dwellers of Paradise beat as one heart; all of them exalt Allah in the morning and in the evening.” (Bukhari, Bad'u'l-Khalk, 8)
The two questions brought about by that hadith can be answered thus:
The glorification mentioned in the hadith is not an obligatory duty that must be carried out in Paradise. The dwellers of Paradise will perform that with great pleasure and enjoyment and with a conscientious delight that they feel inside, toward their Lord Whom they know much closely and whose boundless blessings and bounties they have received. In addition, in a narration by Muslim, it is said: “Just like inspiration of the act of breathing, the dwellers of Paradise will be inspired with glorification and exaltation.” (Muslim, Jannat, 18-19) Just like it is  pleasurable to breath, glorifying Allah in Paradise is as much pleasurable, too. (Ibn Hajar, explanation of the relevant hadith)
The expression 'in the morning and in the evening' is intended to indicate an amount of time with the measure humans are familiar with. (See Ibn Hajar, the work mentioned). It does not mean that there will be darkness of evening. It is to indicate continuity.

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