Sawt Safir al-Bulbul () is an 8th century Arabic poem attributed to al-Asmaÿi.
Al-Asma'i challenged the Abbasid caliph Abu Ja'far al-Mansur, after he had put pressure on poets. He used to memorize the poem the first time he heard it, so he would claim that he had heard it before. After the poet finished reciting the poem, the caliph would recite the poem to him. He had a slave boy who memorized the poem after hearing it twice, so he would bring him to recite it after the poet recited it, and then the caliph. He also had a slave girl who memorized the poem the third time, so he would bring her to recite it after the slave boy to confirm to the poet that the poem had been recited before and was in fact his own composition. He did this with all poets, so the poets turned out disappointed and frustrated, especially since the caliph had set a reward equal to the weight of the poem written on in gold for anyone who could not recite a poem. When al-Asma'i heard of this, he said that the caliph was "tricking and deceiving people", after which he prepared a poem himself, with varied words and strange meanings. He dressed as a bedouin and disguised himself, as he was well-known to the prince.
Some critics doubt the authenticity of the poem's attribution to al-Asma'i due to linguistic errors and other problems. Historians have also reported that al-Asma'i was in contact with Caliph Harun al-Rashid and was one of his companions, but that it has never been reported that he was a companion of al-Mansur and that if it were true, historians would have mentioned it. Al-Asma'i was born in 121 AH, and Al-Mansur ruled from 136 AH to 158 AH. Thus, Al-Asma'i would have been in his early youth during this era. Based on his biography, at this time he was acquiring knowledge, gathering news, and meeting with bedouins, but had not yet been in contact with any of the prince or caliph. It has also been mentioned that the poem's authenticity is weak and that no one has narrated it except in the book "Alam ul-Nasi bima waqae lil baramikati ma bani al-Abbasi" () by Muhammad ibn Diab al-Itlidi.
In early 2025, the poem gained wide popularity on social media, being the background music for the so-called "Tab-Tabi cat", a cat with "a beard and green taqiyah", especially before Ramadan. The original cat is called "Mario", whose Malaysian owner makes videos of him dressing up in different costumes on Instagram.