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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
bayhaqi:12178 – Yaḥyá b. Yaḥyá > Wakīʿ > Abū Hilāl > Qatādah

[Machine] Omar wrote: "If you indulge in pastimes, indulge in archery, and if you speak, speak about religious obligations."  

البيهقي:١٢١٧٨ – قَالَ وَثنا يَحْيَى بْنُ يَحْيَى أنا وَكِيعٌ عَنْ أَبِي هِلَالٍ عَنْ قَتَادَةَ قَالَ

كَتَبَ عُمَرُ إِذَا لَهَوْتُمْ فَالْهُوا بِالرَّمْيِ وَإِذَا تَحَدَّثْتُمْ فَتَحَدَّثُوا بِالْفَرَائِضِ  

See similar narrations below:

Collected by Suyūṭī
suyuti:2-636b – Ibn al-Musayyib
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السيوطي:٢-٦٣٦b –

"عَنِ ابنِ المُسَيِّب قَالَ: كَتَبَ عُمَرُ إلَى أبِى مُوسَى: إذَا لَهَوْتُمْ فَالْهُوا بالرَّمِى، وإذَا تَحَدَّثتم فَتَحدَّثُوا بالفَرائضِ".  

[ك] الحاكم في المستدرك [ق] البيهقى في السنن