Rest

For in the tavern of the mortal world the bile of the man of God is not removed. He will not rest a moment here and will not stain himself with the attachments of the world.

‘Abdu’l-Bahá, Tablets of ‘Abdu’l-Bahá v2, p. 380

Indulge not your bodies with rest, but work with all your souls, and with all your hearts cry out and beg of God to grant you His succour and grace. Thus may ye make this world the Bahá Paradise, and this globe of earth the parade ground of the realm on high. If only ye exert the effort, it is certain that these splendours will shine out, these clouds of mercy will shed down their rain, these life-giving winds will rise and blow, this sweet-smelling musk will be scattered far and wide.

‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, pp. 243-246

Rest not, by day or night; seek ye no moment's peace.

‘Abdu’l-Bahá, Selections from the Writings of ‘Abdu’l-Bahá, pp. 243-246

Therefore the heart is never at rest and never finds real joy and happiness until it attaches itself to the eternal. How foolish the bird that builds its nest in a tree that may perish when it could build its nest in an ever-verdant garden of paradise.

‘Abdu’l-Bahá, Divine Philosophy, p. 136-137

We must strive unceasingly and without rest to accomplish the development of the spiritual nature in man, and endeavor with tireless energy to advance humanity toward the nobility of its true and intended station.

‘Abdu’l-Bahá, Bahá’í World Faith, p. 262

We can never afford to rest on our oars, for if we do, we soon see ourselves carried down stream again.

Shoghi Effendi, Lights of Guidance, p. 113

You should not neglect your health, but consider it the means which enables you to serve. It -- the body -- is like a horse which carries the personality and spirit, and as such should be well cared for so it can do its work! You should certainly safeguard your nerves, and force yourself to take time, and not only for prayer meditation, but for real rest and relaxation.

Shoghi Effendi, Lights of Guidance, p. 296

In this particular passage, he does not forbid "trivial" pleasures, but he does warn against "excessive attachment" to them and indicates that they can often be "misdirected". One is reminded of ‘Abdu’l-Bahá's caution that we should not let a pastime become a waste of time.

The Universal House of Justice, 1997 Jan 12, The Humourist, p. 2

I understand you have been ill and obliged to rest; never mind, from time to time rest is essential, otherwise, like unto ‘Abdu’l-Bahá from excessive toil you will become weak and powerless and unable to work. Therefore rest a few days, it does not matter. I hope that you will be under the care and protection of the Blessed Beauty.

Amatu’l-Bahá Ruhiyyih Khanúm, The Guardian of the Bahá’í Faith, from a tablet to Shoghi Effendi written by ‘Abdu’l-Bahá

Relax thou not in affairs (business), for verily relaxation causes laziness and vexation. Verily Thy Lord will bestow upon thee an ample provision from when thou expectest it not, and He will strengthen thee in that by which thy heart will be at rest through the favors of the Kingdom of El-‘Abhá .

Provisional translation of a Tablet from ‘Abdu’l-Bahá to Edward Getsinger,  cited in Hogenson, Kathryn Jewett, Lighting the Western Sky, p. 333, footnote 10

‘Abdu’l-Bahá moved, on the 27th, to the hotel in Rue Lauriston where He had stayed before. He was very tired, and needed a few days' rest before people learned where He resided.

H.M. Balyuzi, ‘Abdu’l-Bahá - The Centre of the Covenant, p. 393