قَالَ ﷺ: «إذَا كَانَ أحَدُكُمْ مَادِحاً صَاحِبَهُ لَا مَحَالَةَ؛ فَلْيَقُل: أحْسِبُ فُلَانًا: وَ اللهُ حَسِيْبُهُ، وَ لَا أُزَكِّي عَلَى اللهِ أحَداً: أحْسِبُهُ – إنْ كَانَ يَعْلمُ ذَاكَ – كَذَا وَ كَذَا»

I deem so-and-so to be...and Allāh is his reckoner...and I don't praise anyone, putting it (i.e. my praising) forward, in front of Allāh's commendation, however I assume him so and so(if he knows that of him).

Reference: I deem so-and-so to be...and Allāh is his reckoner...and I don't praise anyone, putting it (i.e. my praising) forward, in front of Allāh's commendation, however I assume him so and so(if he knows that of him). Muslim (#3000, 4/2296) and al-Bukhārī (#2662).