Musannaf Ibn Abi Shaybah 27754 — The Prophet (peace and blessings be)

Sa'id bin Jubayr said that Sayyiduna Ibn Abbas (may Allah be pleased with them both) used to recite this verse as: "Darasta". And he would cite this line of poetry as evidence: "Daris is bitter, like the taste of the sab and the alqam (bitter plants)."