“O ye who believe! Eat of the good things wherewith We have provided you, and render thanks to Allah if it is (indeed) He whom ye worship” (Holy Qur’an 2:172)
Eat of whatever is in the earth, provided it is lawful (halal), and good (tayyib). Those things are lawful which Allah has declared lawful, and are earned in a manner that is consistent with the law of God, and the law of the land. Allah has declared all things lawful, with the exception of a few, but it is essential that they should be earned in a lawful manner, and those means that are prohibited by God, and the law of the land should be avoided.
“O men, eat the lawful and good things from what is in the earth.” Ch. 2:168
“O you who believe, forbid no the good things which Allah has made lawful for you” (5:87).