She cannot do rukoo’ and sujood when she prays

Al-Bukhaari narrated in his Saheeh:

‘Imraan ibn Husayn said: “I had haemorrhoids and I asked the
Messenger of Allaah
(peace and blessings of Allaah be upon him) about that. He said,
‘Pray standing; if you cannot do that, then (pray) sitting; if you cannot do that
then (pray) on your side.”

(Saheeh al-Bukhaari, 1066).

If you can stand up, then do not sit, unless that is too
difficult for you. If you sit because it is too difficult to stand, you will still have
the full reward.

Abu Moosa al-Ash’ari reported that the Prophet
(peace and
blessings of Allaah be upon him) said: “If a person gets sick or travels, he will
have the same reward as when he was healthy or not travelling.”

(Narrated by
al-Bukhaari, 2834).

With regard to rukoo’ and sujood, you do not have
to do them because you are not able to do them, since bowing would cause you harm. You
should try to lean forward as much as you can for rukoo’ and sujood, making the
sujood lower than the rukoo’ by nodding or gesturing. The Prophet
(peace and
blessings of Allaah be upon him) said: “Put your forehead on the ground if you can,
otherwise use nods or gestures, and make your sujood lower than your rukoo’.”

Shaykh
al-Albaani said: this was narrated by al-Tabaraani, al-Bazzaar, Ibn al-Sammaak in his
hadeeth (67/2) and al-Bayhaqi. Its isnaad is saheeh as I explained in al-Saheehah
(323). Sifat Salaat al-Nabi
(peace and blessings of Allaah be upon him), p. 79.

Ibn Qudaamah said in the text of al-‘Umdah:
“If a person is unable to do rukoo’ or sujood, he should indicate them by nods
or gestures.”

(al-‘Umdah Sharh al-‘Iddah, p. 126)

If you cannot even nod or gesture, then pray according
to your situation; your rukoo’ and sujood could be by intention only, when you reach
them and recite the appropriate adhkaar in them. Allaah burdens not a person beyond his
scope and He has not laid upon you in religion any hardship. And Allaah knows best.