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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
suyuti:2-1445b – Muḥammad b. ʿUbaydullāh al-Thaqafi > Katab
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السيوطي:٢-١٤٤٥b –

"عَنْ مُحَمَّد بْنِ عُبَيْدِ اللَّه الثَّقَفِىِّ قَالَ: كَتَبَ عُمَرُ بْنُ الْخَطَّابِ: مَنْ كَانَتْ عِنْدَهُ شَهادَةٌ فَلَمْ (*) يَشْهَدْ بِهَا حَيثُ رَآهَا وَحَيْتُ عَلِمَها، فَإِنَّمَا يَشَهْدُ عَلَى ضِغْنٍ".  

[عب] عبد الرازق (* *) [ص] سعيد بن منصور [ق] البيهقى في السنن

See similar narrations below:

Collected by Bayhaqī
bayhaqi:20597 – Abū Ḥāzim al-Ḥāfiẓ > Abū al-Faḍl b. Khimayrawayh > Aḥmad b. Najdah > Saʿīd b. Manṣūr > Hushaym > Abū Isḥāq al-Shaybānī > Muḥammad b.

[Machine] Umar ibn al-Khattab wrote: "Whoever possesses testimony but does not testify where they saw it or where they know it to be, then indeed they testify against themselves. This is a clear-cut grievance between the Thaqafi and Umar."  

البيهقي:٢٠٥٩٧ – أَخْبَرَنَا أَبُو حَازِمٍ الْحَافِظُ أنبأ أَبُو الْفَضْلِ بْنُ خِمَيْرَوَيْهِ ثنا أَحْمَدُ بْنُ نَجْدَةَ ثنا سَعِيدُ بْنُ مَنْصُورٍ ثنا هُشَيْمٌ أنبأ أَبُو إِسْحَاقَ الشَّيْبَانِيُّ عَنْ مُحَمَّدِ بْنِ عُبَيْدِ اللهِ الثَّقَفِيِّ قَالَ

كَتَبَ عُمَرُ بْنُ الْخَطَّابِ ؓ مَنْ كَانَتْ عِنْدَهُ شَهَادَةٌ فَلَمْ يَشْهَدْ بِهَا حَيْثُ رَآهَا أَوْ حَيْثُ عَلِمَ فَإِنَّمَا يَشْهَدُ عَلَى ضِغْنٍ هَذَا مُنْقَطِعٌ فِيمَا بَيْنَ الثَّقَفِيِّ وَعُمَرَ ؓ