It is narrated from Sayyiduna Jabir (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "There are three deeds; whoever does them with full trust in Allah and seeking reward, it is a right upon Allah Almighty that He help him and grant him blessing: whoever strives to free a neck (a slave or a captive), trusting in Allah and seeking reward, it is a right upon Allah Almighty that He help him and bless him; whoever marries, trusting in Allah and seeking reward, it is a right upon Allah Almighty that He help him and grant him blessing; and whoever revives a barren land, trusting in Allah and seeking reward, it is a right upon Allah Almighty that He help him and grant him blessing."
Hadith Referenceالمعجم الأوسط / باب الغين / 4918
Hadith Gradingمحدثین:فيه عبيد الله بن الوازع لم يرو عنه إلا حفيده، وبقية رجاله ثقات
Hadith Takhrij«قال الهيثمي: فيه عبيد الله بن الوازع روى عنه حفيده عمرو بن عاصم فقط وبقية رجاله ثقات «مجمع الزوائد ومنبع الفوائد، ج 4، ص 258»» «أخرجه البيهقي فى «السنن الكبرى» برقم: 21651، والطبراني فى «الصغير» برقم: 737»