Umar ibn Khattab (r.a) asked Ubbay ibn Ka’ab (r.a),
"What is the meaning of Tawqa?" Ubbay ibn Ka’ab said,
"O Amir ul Mu’minin, have you walked on a field that had a lot of thorny plants?" Umar said,
"Yes" Ubbay ibn Ka’ab said,
"So what did you do?" Umar replied,
"I lifted up my clothes and I was very careful," Ubbay ibn Ka’ab said,
"That is Taqwa."
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http://www.tafsir.com/default.asp?sid=2&tid=775]
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