The supplication you make for your parents during the taraaweeh or tahajjud prayer is better by far than you slaughtering 10 camels [in their names].
[Regarding] the ‘umrah, if he (the son) wants to gift [the reward of] an ‘umrah to his deceased father, even though he (the father) had done ‘umrah himself…
What is the ruling of [performing] hajj on behalf of both parents who have died without [themselves] having performed hajj?
Whoever walks in front of his father, then he has disobeyed him, unless he walked [ahead] to remove [any] harm from his path.
Rather, pay full attention to them both, unless there is an urgent [and important] call which must be answered and cannot be delayed!