The Messenger of Allah ﷺ said, "Do not call the hypocrite 'master,' for if he truly is a master, you have angered your Lord ."
حدثنا عبيد الله بن عمر بن ميسرة حدثنا معاذ بن هشام قال حدثني أبي عن قتادة
قال رسول الله ﷺ لا تقولوا للمنافق سيد فإنه إن يك سيدا فقد أسخطتم ربكم عز وجل
[Its chain of transmission is daif] Bukhari narrated it in Adab al-Mufrad, no. 760, Ahmad: 5/346, and Nasai in Kubra, no. 10073, and in Amal al-Yawm wal-Layla, no. 244, from the hadith of Muaz bin Hisham Dastawai, with this chain. Qatada narrated with "an" (indicating a possible break in the chain), and it has a daif corroborating narration in Hakim, 4/311.