What is the ruling on
saying certain statements like "You have blessed us"
or "We are blessed by your visit" to express a person's warm welcome to their guest?
The phrase "Blessed is He" can not be used except for Allah (Glorified be He). He (Exalted be He) (Part No. 26; Page No. 366) says,
Blessed be He Who sent down the criterion (of right and wrong, i.e. this Qur’ân) to His slave (Muhammad صلى الله عليه وسلم)
Blessed be He in Whose Hand is the dominion
So Blessed is Allâh, the Best of creators.
Regarding anyone other than Allah, it is only permissible to say: "So and so is made blessed by Allah". Proof for the foregoing is that Allah (Exalted be He) says regarding Prophet `Isa (Jesus, peace be upon him):
And He has made me blessed wheresoever I be
He (may He be glorified) also says,
Verily, the first House (of worship) appointed for mankind was that at Bakkah (Makkah), full of blessing, and a guidance for Al-‘Alamîn (mankind and jinn).
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.