The book covers:

Ibn al-Mubarak looked at him, his face pale not from the fight, but from the fear of being recognized. He made Abdah swear a solemn oath: He did not want the praise of men to tarnish the sincerity of his deed before God. Core Themes of Sifat as-Safwah

Be careful when searching for "Sifat PDF" in English. Many results will refer to Sifat al-Huroof

Searching for (The Characteristics of the Chosen) by the 12th-century scholar Ibn al-Jawzi typically leads to its English translation, often titled "The Descriptions of the Best" or "Attributes of the Elect."

, which host various translations of Ibn al-Jawzi’s works. Gems from Sifat as-Safwah: There is a popular translated compilation titled Gems from Sifat as-Safwah