I used to teach World Religions at least once a year at a local university, I thought you might find this interesting:
Buddhism:
"...a state that is not pleasing or delightful to me, how could I inflict that upon another?" Samyutta NIkaya v. 353
Hurt not others in ways that you yourself would find hurtful." Udana-Varga 5:18
Christianity:
"Therefore all things whatsoever ye would that men should do to you, do ye even so to them: for this is the law and the prophets." Matthew 7:12, King James Version.
"And as ye would that men should do to you, do ye also to them likewise." Luke 6:31, King James Version.
"...and don't do what you hate...", Gospel of Thomas 6. The Gospel of Thomas is one of about 40 gospels that were widely accepted among early Christians, but which never made it into the Christian Scriptures (New Testament).
Confucianism:
"Do not do to others what you do not want them to do to you" Analects 15:23
"Tse-kung asked, 'Is there one word that can serve as a principle of conduct for life?' Confucius replied, 'It is the word 'shu' -- reciprocity. Do not impose on others what you yourself do not desire.' Doctrine of the Mean 13.3
"Try your best to treat others as you would wish to be treated yourself, and you will find that this is the shortest way to benevolence." Mencius VII.A.4
Hinduism:
"This is the sum of duty: do not do to others what would cause pain if done to you." Mahabharata 5:1517
"Listen to the essence of Dharma. Having listened, focus on it, and establish it in your mind. Do not do any thing to others which you do not want to be done to yourself" Vedas
Islam: "None of you [truly] believes until he wishes for his brother what he wishes for himself." Number 13 of Imam "Al-Nawawi's Forty Hadiths." 5
Jainism:
"Therefore, neither does he [a sage] cause violence to others nor does he make others do so." Acarangasutra 5.101-2.
"In happiness and suffering, in joy and grief, we should regard all creatures as we regard our own self." Lord Mahavira, 24th Tirthankara
"A man should wander about treating all creatures as he himself would be treated." Sutrakritanga 1.11.33
Judaism:
"...thou shalt love thy neighbor as thyself.", Leviticus 19:18
"What is hateful to you, do not to your fellow man. This is the law: all the rest is commentary." Talmud, Shabbat 31a.
"And what you hate, do not do to any one." Tobit 4:15 6
Shinto:
"The heart of the person before you is a mirror. See there your own form"
"Be charitable to all beings, love is the representative of God." Ko-ji-ki Hachiman Kasuga
Sikhism:
Compassion-mercy and religion are the support of the entire world". Japji Sahib
"Don't create enmity with anyone as God is within everyone." Guru Arjan Devji 259
"No one is my enemy, none a stranger and everyone is my friend." Guru Arjan Dev : AG 1299
Sufism: "The basis of Sufism is consideration of the hearts and feelings of others. If you haven't the will to gladden someone's heart, then at least beware lest you hurt someone's heart, for on our path, no sin exists but this." Dr. Javad Nurbakhsh, Master of the Nimatullahi Sufi Order.
Taoism:
"Regard your neighbor's gain as your own gain, and your neighbor's loss as your own loss." T'ai Shang Kan Ying P'ien.
"The sage has no interest of his own, but takes the interests of the people as his own. He is kind to the kind; he is also kind to the unkind: for Virtue is kind. He is faithful to the faithful; he is also faithful to the unfaithful: for Virtue is faithful." Tao Teh Ching, Chapter 49
I have chosen this list based on Huston Smith, The World's Religions.