Buddhism: The bhikkhu who abides in loving-kindness, who is pleased with the Buddha’s teaching, attains to that state of peace and happiness (Dhammapada 368).
Hinduism: What sort of religion can it be without compassion?
You need to show compassion to all living beings.
Compassion is the root of all religious faiths (Basavanna, Vachana 247).
Islam: Treat people in such a way and live amongst them in such a manner that if you die they will weep over you; alive they crave for your company (Nahjul Balagha, Saying 9).
Christianity: Love covers a multitude of sins (1 Peter 4.8).
Jainism: Have benevolence towards all living beings, joy at the sight of the virtuous, compassion and sympathy for the afflicted, and tolerance towards the indolent and ill-behaved (Tattvarthasutra 7.11).
Taoism: He who can find no room for others lacks fellow feeling, and to him who lacks fellow feeling, all men are strangers (Chuang Tzu 23).
Judaism: The world stands upon three things: upon the Law, upon worship, and upon showing kindness (Mishnah, Abot 1.2).
Confucianism: Mencius said, “‘Benevolence’ means ‘man.’ When these two are conjoined, the result is ‘the Way’ (Mencius VII.B.16).