We are encouraged to take care of the sick. Anyone who is sick is in need of our assistance and care taking.
Imam Zayn al-Abidin (a.s.) said, 'Verily the one whom Allah is most pleased with from among you is the one who is the most generous towards his dependents.’[Bihar al-Anwar, v. 78, p. 136, no. 13]
The Prophet (salla Llahu alayhi wa aleehi wa sallam) called it an act of charity, and emphasized the importance of assisting those in need.
The Prophet (S) said, ‘Verily every single Muslim is to give in charity every single day.’ When asked who would be capable of such a thing, he replied, ‘Your removal of an obstacle from the road is a charitable act; your guiding someone the way is a charitable act; your visiting the sick is a charitable act; your enjoinment of good to others is a charitable act; your forbidding others from wrongdoing is a charitable act, and your returning the greeting of peace is a charitable act.’[Bihar al-Anwar v. 75, p. 50, no. 4]
Besides the common commands of helping and assisting a sick person, one of the rights of a wife is that her husband takes care of her.
The Prophet (S) said, 'The right of a woman on her husband is that he feeds her, clothes her, and does not cause her to lose face [by insulting her or chiding her].’[Bihar al-Anwar, p. 254, no. 60]
Despite being able to fulfill these rights in other ways, it is recommended to show compassion and love.
The Prophet (S) said, 'A man's sitting beside his family is more beloved in the sight of Allah than his spending the night in worship in this mosque of mine.’[Tanbih al-Khawatir, v. 2, p. 122]
Furthermore, taking care of her needs which is highly rewarded.
The Prophet (S) said, 'Verily the man who lifts a morsel of food to his wife's mouth is well rewarded.’[al-Mahajjat al-Baydha, v. 3, p. 70]
The Prophet (S) said, 'If a man quenches his wife's thirst he is rewarded for it.’[Kanz al-’Ummal, no. ]44435