The Book of Miscellany continues.

Riyad as-Salihin, The Book of Miscellany
Book 1, Hadith 145
Narrated 'Abu Hurairah (ra):
The Prophet (pbuh) said, "The religion (of Islam) is easy, and whoever makes the religion a rigour, it will overpower him. So, follow a middle course (in worship); if you can't do this, do something near to it and give glad tidings and seek help (of Allah) at morn and at dusk and some part of night".[Al-Bukhari].

Riyad as-Salihin, The Book of Miscellany
Book 1, Hadith 146
Narrated 'Anas (ra):
The Prophet (pbuh) came into the mosque and noticed a rope stretched between two poles. He enquired, "What is this rope for?" He was told: "This is Zainab's rope. When during her voluntary prayer, she begins to feel tired, she grasps it for support". The Prophet (pbuh) said, "Untie it. You should perform prayers so long as you feel active. When you feel tired, you should go to sleep".[Al-Bukhari and Muslim].

Riyad as-Salihin, The Book of Miscellany
Book 1, Hadith 147
Narrated 'Aishah (ra):
Messenger of Allah (pbuh) said, "When one of you feels drowsy during prayer, let him lie down till drowsiness goes away from him, because when one of you performs prayers while feeling sleepy, he does not know whether he seeks forgiveness or abuses himself".[Al-Bukhari and Muslim].