Sa'id bin Jubayr said: I asked Ibn Abbas (may Allah be pleased with them both): Did the polytheists torment the Muslims to such an extent that they would be excused for abandoning their religion? He said: Yes, by Allah; they would beat one of them and keep him hungry and thirsty until, because of the pain, he could not even sit upright, until he would utter with his tongue the words they demanded of him.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب المرتد / 16898