The 14th hadith in the Heart Theray Series:

The Messenger salla Allahu alayhi wa sallam said: (A thankful heart, a tongue that remembers Allah, and a pious woman that helps you in your worldly and religious matters are the best that people treasure)
Reported by al-Bayhaqi in Shu‘ab al-Iman (4116) and declared to be sahih by al-Albani (Sahih al-Jami‘ 4409)
قالَ رسول الله ﷺ: (قَلْبٌ شَاكِرٌ و لِسانٌ ذاكِرٌ و زَوْجَةٌ صالِحَةٌ تُعينُكَ على أَمْرِ دُنْياكَ و دينِكَ خَيْرُ ما اكْتَنَزَ النَّاسُ)
رواه البيهقي في شعب الإيمان (4116) وصححه الألباني (صحيح الجامع 4409