No one should ask anyone else to make du'a (supplication) for them, because this leads them to rely on the du'a of others. Is this a general rule?

Question:
The Honorable Shaykh, may Allah grant you success, says: We discussed in the book on tawassul (seeking nearness to Allah through a means) and wasilah (means of approach) that the Prophet's (peace and blessings be upon him) statement to 'Umar regarding du'a means that the benefit returns to 'Umar, and that no one should ask anyone else to make du'a for them, because this leads them to rely on the du'a of others. His question is: Is this a general rule?

Answer:
Yes, we told you there that it is better for a person to make du'a himself and be independent of others, rather than asking others to make du'a for him, because this involves a need for the creation and humility before the creation. A Muslim should be modest about asking; he should be modest about asking. So, making du'a himself is better. However, it is permissible to ask someone to make du'a for you; this is permissible, but it is a difference in what is better.