The Ruling on Greeting and Supplication When Passing by Graveyards

Your Eminence! If a person passes by graveyards, is it prescribed for him to greet them while on the road, whether he sees the graves or not, for example, if he is in a car?
As for if he sees them,The jurists (may Allah have mercy on them) mentioned: the one passing by them is like the one standing there—Meaning: he greets them and makes supplication. As for the one behind a wall, there is some hesitation regarding this.It may be said: As long as this wall is a fence around this graveyard, he greets them.And it may be said: He does not greet them because he does not see graves, but in such a case, if he makes a general supplication, not as a supplication for visiting, that is good.